Being self-employed gives you greater control over how you work, but it also means taking responsibility for reporting your income and paying the correct tax to HM Revenue & Customs.
For many sole traders, freelancers and contractors, this is done through Self Assessment.
Self Assessment is not a separate type of tax. It is the system HMRC uses to collect information about income that has not already been fully taxed through PAYE and to calculate the Income Tax, National Insurance and other amounts you may owe.
For the 2026/27 tax year, running from 6 April 2026 to 5 April 2027, there is another important consideration: Making Tax Digital for Income Tax has now started for qualifying sole traders and landlords with qualifying income above £50,000.
That makes accurate bookkeeping and understanding your reporting obligations more important than ever.
This Accfirm guide explains who needs Self Assessment, how to register, what income to report, which expenses you can claim, how much tax and National Insurance you may pay, the relevant deadlines, payments on account and what Making Tax Digital means for self-employed people in 2026/27.
What Is Self Assessment for Self-Employed People?
Self Assessment is HMRC’s system for calculating and collecting tax from people whose income cannot be dealt with entirely through PAYE.
If you are self-employed, your business normally receives income without Income Tax being deducted automatically.
You therefore calculate your business profit and report it to HMRC.
Your basic calculation is:
Business income − allowable business expenses = trading profit
HMRC then considers that profit together with your other taxable income, allowances and reliefs to calculate your tax liability.
A Self Assessment return may therefore include more than your self-employed income.
Depending on your circumstances, it could also include:
- Employment income.
- Company director salary.
- Dividends.
- Property income.
- Savings income.
- Foreign income.
- Pension income.
- Capital gains.
- Other taxable income.
Self-employed individuals normally report their business income through the self-employment section of their tax return. Paper returns use the SA103S or SA103F supplementary pages where applicable.
Who Needs to Register for Self Assessment?
You normally need to register as a sole trader if your gross trading income exceeds £1,000 during the tax year.
HMRC also requires registration in certain other circumstances, including where you need to prove that you are self-employed, wish to make eligible voluntary Class 2 National Insurance contributions or need to register under the Construction Industry Scheme.
The important word here is gross.
The £1,000 test considers your income before business expenses are deducted.
Example
Suppose you earn:
- £4,000 from freelance work.
- £3,200 of allowable business expenses.
Your profit is only £800.
However, your gross trading income is £4,000, meaning you have exceeded the £1,000 trading-income threshold and will normally need to register.
What If Your Self-Employment Income Is £1,000 or Less?
The trading allowance provides up to £1,000 of tax-free qualifying trading income each tax year.
If your annual gross qualifying trading income is £1,000 or less, you generally do not need to tell HMRC solely because of that income, subject to the eligibility rules and any other reasons you may need to submit a tax return.
For example, earning £750 from occasional qualifying freelance work may be fully covered by the trading allowance.
However, you may still choose or need to register where, for example, you:
- Want to claim a trading loss.
- Need to make voluntary National Insurance contributions.
- Have other income requiring Self Assessment.
- Have received a notice from HMRC requiring you to file a return.
If HMRC has already asked you to submit a return, do not simply ignore it because your income has fallen below £1,000. Ask HMRC to withdraw the filing requirement if appropriate.
Is Self Assessment Only for Sole Traders?
No.
Self Assessment can apply to many individuals, including freelancers, contractors, landlords, business partners and company directors with relevant untaxed income.
However, simply being a company director does not automatically mean every director must file Self Assessment.
A director may need a tax return because they receive dividends, untaxed income or have another reporting requirement.
A director who separately operates a sole trader business may need to report both the relevant company-related personal income and the profits from their self-employment.
Remember that the limited company and the individual’s sole trader business are separate for accounting and tax purposes.
Self Assessment Deadlines for 2026/27
For income earned during the 2026/27 tax year, the standard Self Assessment timetable is:
| Requirement | Deadline |
|---|---|
| 2026/27 tax year starts | 6 April 2026 |
| 2026/27 tax year ends | 5 April 2027 |
| Register with HMRC if newly required | 5 October 2027 |
| Paper Self Assessment return | 31 October 2027 |
| Online Self Assessment return | 31 January 2028 |
| Balancing tax payment | 31 January 2028 |
| First payment on account for 2027/28, where applicable | 31 January 2028 |
| Second payment on account for 2027/28 | 31 July 2028 |
HMRC’s standard rule is that a person who is newly required to file must normally notify HMRC by 5 October following the end of the relevant tax year. Online returns are normally due by 31 January following that, with tax also payable by 31 January.
Important current-year distinction
Because it is currently the 2026/27 tax year, many people will presently be preparing their 2025/26 return.
The 2025/26 online Self Assessment deadline is:
31 January 2027
The return covering income earned during 2026/27 will instead normally be submitted by:
31 January 2028
Do not confuse the tax year you are currently working in with the tax return currently due.
How to Register for Self Assessment as Self-Employed
Registering as a sole trader means registering your self-employment for Self Assessment with HMRC.
You should complete the process through the official HMRC service.
Step 1: Check Whether You Need Self Assessment
Establish whether your self-employed income or wider circumstances require you to submit a tax return.
If gross qualifying trading income exceeds £1,000, registration is normally required.
Step 2: Gather Your Information
HMRC may require information including:
- Your full name.
- Date of birth.
- National Insurance number.
- Home address.
- Contact details.
- Date you started self-employment.
- Nature of your business.
- Existing tax information where relevant.
You need a National Insurance number for the standard sole-trader registration process.
Step 3: Register Online
Complete the appropriate Self Assessment registration process.
If you have previously used Self Assessment but did not need to file for the previous year, you may need to reactivate your account rather than create a new tax record.
Step 4: Obtain Your UTR
Once registered, HMRC will provide or confirm your Unique Taxpayer Reference, commonly called a UTR.
You will use this reference when dealing with your Self Assessment tax affairs.
Step 5: Start Keeping Accurate Records
Do not wait until January to begin bookkeeping.
Record income and expenses as your business operates so your tax return can be prepared using reliable figures.
What Records Do Self-Employed People Need?
Your Self Assessment return should be supported by reliable business records.
These typically include:
- Sales invoices.
- Customer receipts.
- Business bank statements.
- Cash income records.
- Supplier invoices.
- Expense receipts.
- Business mileage records.
- Equipment purchases.
- Loan and finance records.
- VAT information where applicable.
- Payroll information if you employ staff.
- Details of other taxable income.
Good bookkeeping is not simply about satisfying HMRC.
It also helps you understand:
- Profitability.
- Outstanding customer invoices.
- Business costs.
- Cash flow.
- Future tax payments.
- VAT exposure.
- Business performance.
How Long Must You Keep Self Assessment Records?
Self-employed taxpayers generally need to keep business records for at least five years after the 31 January Self Assessment submission deadline for the relevant tax year.
For 2026/27, the normal filing deadline is 31 January 2028.
That means the supporting records would ordinarily need to be retained until at least:
31 January 2033
Different requirements can apply where returns are submitted very late or an HMRC enquiry remains open.
Cash Basis Accounting and Self Assessment
Cash basis accounting is now the standard accounting method for eligible sole traders and partnerships without corporate partners.
Under cash basis, you generally record:
Income when you receive the money.
Expenses when you pay them.
Cash basis became the default method from 6 April 2024, although eligible businesses can choose traditional accounting where appropriate.
Example
You complete £4,000 of work in March 2027.
You send the customer an invoice on 20 March 2027.
The customer pays on 20 April 2027.
Under cash basis, the £4,000 would normally be included in the 2027/28 tax year because that is when you received payment.
Traditional accounting would generally recognise the income according to when it was earned rather than simply when payment was received.
How to Calculate Your Self-Employed Profit
Your tax is not usually calculated on your total sales.
Instead, you calculate your taxable business profit.
For many businesses:
Turnover − allowable business expenses = trading profit
Example
A self-employed consultant has:
| Item | Amount |
|---|---|
| Business turnover | £50,000 |
| Allowable expenses | £14,000 |
| Trading profit | £36,000 |
The £36,000 trading profit is the starting point for calculating Income Tax and National Insurance, subject to any other adjustments or reliefs.
The £50,000 turnover still matters for other purposes, such as Making Tax Digital eligibility and potentially VAT, but it is not automatically the amount on which Income Tax is charged.
What Expenses Can You Claim on Self Assessment?
Self-employed people can generally deduct qualifying business expenses when calculating taxable profits.
The expenditure must meet the relevant tax rules and genuinely relate to the business.
Common categories include:
Office Costs
Examples include stationery, printing, postage and qualifying software subscriptions.
Business Premises
Relevant costs can include business rent, utilities and business insurance.
Advertising and Marketing
Website hosting, online advertising, promotional materials and eligible marketing expenditure can generally be considered.
Travel Costs
Qualifying business journeys, parking, public transport and accommodation can potentially be deductible.
Ordinary commuting between home and a permanent workplace is treated differently.
Professional Fees
Qualifying business accountancy, bookkeeping, legal and professional fees can be deductible.
HMRC confirms that accountancy and professional fees relating to business activities can qualify, although the cost of preparing and submitting the individual’s Self Assessment return itself is specifically excluded.
Staff Costs
Eligible expenses may include:
- Employee salaries.
- Bonuses.
- Employer National Insurance.
- Workplace pension costs.
- Agency fees.
- Subcontractor payments.
- Relevant staff training.
Working From Home
If you work from home, you may be able to claim an appropriate business proportion of relevant household expenses or use simplified expenses where eligible.
Equipment
Business equipment may receive relief under cash basis or capital allowance rules depending on the asset and circumstances.
Expenses You Should Not Automatically Claim
Paying something from your business account does not automatically make it tax deductible.
Common problem areas include:
- Personal groceries.
- Private holidays.
- Ordinary clothing.
- Personal entertainment.
- Fines and penalties.
- Capital expenditure requiring different tax treatment.
- Private parts of mixed business/personal expenses.
- Owner’s drawings.
Always separate personal expenditure from legitimate business expenditure.
Trading Allowance vs Actual Expenses
Instead of deducting actual business expenses, eligible individuals may choose to use the £1,000 trading allowance.
The allowance can be useful where actual qualifying expenses are relatively low.
Example A — Trading allowance is better
Income: £5,000
Actual expenses: £300
Using actual expenses:
£5,000 − £300 = £4,700 profit
Using trading allowance:
£5,000 − £1,000 = £4,000 profit
In this simplified example, the trading allowance produces the lower taxable trading profit.
Example B — Actual expenses are better
Income: £10,000
Actual expenses: £3,500
Using trading allowance:
£10,000 − £1,000 = £9,000
Using expenses:
£10,000 − £3,500 = £6,500
Here, actual expenses are likely to be more beneficial.
You cannot generally deduct both the £1,000 trading allowance and actual expenses against the same qualifying trading income.
How Much Income Tax Do Self-Employed People Pay in 2026/27?
For the 2026/27 tax year, the standard Personal Allowance remains:
£12,570
For taxpayers in England, Wales and Northern Ireland who receive the full standard Personal Allowance, the main rates for ordinary non-savings, non-dividend income are:
| Income | Rate |
|---|---|
| Up to £12,570 | 0% |
| £12,571 to £50,270 | 20% |
| £50,271 to £125,140 | 40% |
| Above £125,140 | 45% |
The Personal Allowance is reduced by £1 for every £2 of adjusted net income above £100,000 and is fully withdrawn at £125,140.
Scotland has different Income Tax bands and rates for earned and self-employed income, so Scottish taxpayers should use the Scottish rates when calculating their liability.
National Insurance for Self-Employed People in 2026/27
Self-employed National Insurance mainly involves Class 4, while Class 2 operates differently following reforms introduced in 2024.
For 2026/27:
| Profit level | National Insurance treatment |
|---|---|
| Below £7,105 | No compulsory Class 2; voluntary Class 2 may be available |
| £7,105 or more | Class 2 generally treated as paid |
| Above £12,570 | Class 4 becomes payable |
| £12,570 to £50,270 | 6% Class 4 |
| Above £50,270 | 2% Class 4 |
The voluntary Class 2 rate for 2026/27 is £3.65 per week.
Class 2 being treated as paid can help protect entitlement to the State Pension and certain contributory benefits without requiring an actual Class 2 payment where the qualifying conditions are met.
Self-Employed Tax Example for 2026/27
Consider a sole trader in England with:
- Turnover: £45,000.
- Allowable expenses: £10,000.
- Trading profit: £35,000.
- No other taxable income.
- Full Personal Allowance available.
Step 1: Calculate taxable Income Tax amount
£35,000 − £12,570 = £22,430
Step 2: Calculate Income Tax
£22,430 × 20% = £4,486
Step 3: Calculate Class 4 National Insurance
£35,000 − £12,570 = £22,430
£22,430 × 6% = £1,345.80
Estimated total
| Liability | Amount |
|---|---|
| Income Tax | £4,486.00 |
| Class 4 NI | £1,345.80 |
| Total | £5,831.80 |
This is a simplified illustration.
The actual bill could differ because of:
- Other income.
- Pension contributions.
- Gift Aid.
- Student loan repayments.
- Capital gains.
- Marriage Allowance.
- Tax already paid.
- Business losses.
- Other reliefs.
- Payments on account.
How to Complete a Self-Employed Self Assessment Tax Return
Step 1: Gather Your Records
Collect your income, expense and other tax information before starting.
Do not rely solely on your bank balance.
Your closing bank balance is not your business profit.
Step 2: Check the Correct Tax Year
For a 2026/27 return, you are reporting relevant activity between:
6 April 2026 and 5 April 2027
Step 3: Check Your Business Income
Add the appropriate business receipts according to your accounting method.
Check:
- Sales.
- Fees.
- Cash receipts.
- Online payments.
- Marketplace income.
- Other trading income.
Step 4: Enter Allowable Expenses
Classify your genuine business expenditure correctly.
Keep supporting evidence for the figures included.
Step 5: Report Other Income
Your return may also need to include:
- PAYE employment.
- Company salary.
- Dividends.
- Rental income.
- Savings.
- Foreign income.
- Pension income.
- Capital gains.
Step 6: Claim Relevant Reliefs
Review whether you qualify for relief such as:
- Pension tax relief.
- Gift Aid.
- Trading losses.
- Capital allowances.
- Marriage Allowance where relevant.
- Other available reliefs.
Step 7: Review HMRC’s Calculation
Check your calculated Income Tax, National Insurance and other amounts carefully.
A much higher or lower bill than expected should be investigated before submission.
Step 8: Submit the Return
For ordinary online Self Assessment, the standard 2026/27 submission deadline is:
31 January 2028
You can normally file earlier once the tax year has ended.
HMRC specifically notes that submitting earlier can help you understand what you owe and give you more time to budget before the payment deadline.
Step 9: Save Your Submission Confirmation
Keep:
- Your tax return.
- Tax calculation.
- Submission acknowledgement.
- Payment confirmation.
- Supporting accounting records.
What Are Payments on Account?
Payments on account are advance payments towards your next Self Assessment tax bill.
You normally make two payments:
31 January
and
31 July
Each payment is normally half of the previous year’s relevant tax liability.
Payments on account generally include Income Tax and Class 4 National Insurance.
When Do Payments on Account Apply?
You will normally have to make payments on account unless:
- The relevant tax owed for the previous year was less than £1,000, or
- More than 80% of the previous year’s tax was collected outside Self Assessment, for example through PAYE.
Why Can Your First January Tax Payment Be So High?
This catches many new sole traders by surprise.
Suppose your first Self Assessment liability is:
£6,000
Your first payment on account could be:
£3,000
That could make your January payment:
| Payment | Amount |
|---|---|
| Tax for previous year | £6,000 |
| First payment on account | £3,000 |
| Total due in January | £9,000 |
You could then owe another:
£3,000 on 31 July
The additional money is not another tax on the same profit. It is an advance payment towards your next year’s liability.
Can You Reduce Payments on Account?
Potentially, yes.
If you reasonably expect your next tax liability to be lower, you can apply to reduce your payments on account.
This might happen because:
- Your business profits have fallen.
- You have stopped trading.
- You are working fewer hours.
- Your allowable expenses have increased.
- More of your income will be taxed through PAYE.
However, reducing payments too far can result in interest being charged if the final liability turns out to be higher than the amount paid.
Making Tax Digital for Income Tax in 2026/27
This is one of the most important changes affecting Self Assessment in 2026/27.
Making Tax Digital for Income Tax became mandatory from 6 April 2026 for qualifying sole traders and landlords whose qualifying income shown on their 2024/25 tax return exceeded £50,000.
The rollout is:
| Qualifying income | Tax return used | MTD start |
|---|---|---|
| More than £50,000 | 2024/25 | 6 April 2026 |
| More than £30,000 | 2025/26 | 6 April 2027 |
| More than £20,000 | 2026/27 | 6 April 2028 |
Qualifying income generally means your gross self-employment and property income before expenses.
That means MTD eligibility is based on turnover-type income rather than your final taxable profit.
What Must You Do Under Making Tax Digital?
If MTD for Income Tax applies to you, you generally need compatible software to:
- Maintain digital records.
- Record self-employment and property income and expenses.
- Send quarterly updates to HMRC.
- Add other income, allowances and adjustments.
- Submit your annual tax return through compatible software.
MTD does not mean you pay Income Tax every quarter.
The normal annual tax payment deadline remains.
MTD Quarterly Deadlines for 2026/27
The standard quarterly deadlines are:
| Update | Deadline |
|---|---|
| First | 7 August 2026 |
| Second | 7 November 2026 |
| Third | 7 February 2027 |
| Fourth | 7 May 2027 |
The standard reporting periods are cumulative from the beginning of the tax year.
For example, the second standard quarterly update generally includes information covering the period from 6 April through 5 October.
Are There Penalties for Missing MTD Quarterly Updates in 2026/27?
HMRC has introduced a special first-year concession.
For the 2026/27 tax year, HMRC will not apply penalty points for late quarterly MTD updates.
However, taxpayers must still maintain their digital records and submit the required quarterly information before completing the annual tax return.
From later years, late quarterly submissions can generate penalty points, with mandatory MTD taxpayers generally reaching the penalty threshold at four points.
This concession does not mean you can ignore MTD during 2026/27.
Self Assessment Late Filing Penalties
For taxpayers remaining under the ordinary Self Assessment penalty system, a late tax return can result in:
| Delay | Potential penalty |
|---|---|
| Immediately late | £100 |
| More than 3 months | £10 per day, up to £900 |
| More than 6 months | £300 or 5% of tax due, whichever is greater |
| More than 12 months | Further penalties, normally at least £300 or 5%, with higher amounts possible in serious cases |
Late tax payment can also trigger penalties and interest.
Taxpayers who have entered MTD for Income Tax are moving onto a newer points-based submission and late-payment penalty regime, so it is important to identify which system applies to your tax year and circumstances.
What Happens If You Register Late?
If you should have notified HMRC by 5 October but register late, a failure-to-notify penalty may apply where tax remains unpaid by the relevant deadline.
The penalty is linked to the unpaid tax rather than being an automatic £100 registration penalty in every case.
Register as soon as you realise you have missed the deadline.
Delaying further can increase the risk of additional interest or penalties.
What If You Cannot Pay Your Tax Bill?
Do not ignore the bill.
HMRC may allow eligible taxpayers to arrange a Time to Pay arrangement.
The appropriate arrangement depends on your circumstances and outstanding balance.
Even if you cannot pay everything immediately, submitting your return on time is still important.
Late filing and late payment are separate issues.
Self-Employed and Employed at the Same Time
You can be employed and self-employed simultaneously.
For example, you might:
- Earn £35,000 through PAYE employment.
- Run a freelance business making £15,000 profit.
Your employer deducts PAYE tax and employee National Insurance from your salary.
Your self-employed profit is then reported through Self Assessment.
Both income sources are considered when calculating your overall Income Tax liability.
Your Personal Allowance is not separately duplicated for each activity.
You may also have both Class 1 National Insurance from your employment and Class 4 National Insurance relating to self-employment.
Self-Employed While Running a Limited Company
A person can be:
- A limited company director.
- An employee of their company.
- A shareholder.
- And separately operate a genuine sole trader business.
However, these activities must be accounted for properly.
Company sales belong to the company.
They should not simply be transferred into the director’s sole trader Self Assessment figures.
Likewise, the company’s allowable expenses belong in the company’s accounting records rather than being deducted automatically from the individual’s sole trader income.
Professional advice is recommended where the dividing line between company activity and personal self-employment is unclear.
Does Self Assessment Include VAT?
VAT and Self Assessment are separate tax systems.
Self Assessment calculates personal tax on income and trading profits.
VAT applies to relevant taxable supplies.
The current compulsory UK VAT registration threshold is £90,000 of VAT-taxable turnover, subject to the applicable tests.
A sole trader can therefore:
- Need Self Assessment without being VAT registered.
- Be VAT registered while also completing Self Assessment.
- Use MTD for VAT and potentially MTD for Income Tax under different sets of rules.
Do not confuse the £90,000 VAT threshold with MTD Income Tax thresholds or the £1,000 trading allowance.
Common Self Assessment Mistakes Self-Employed People Should Avoid
1. Confusing Turnover With Profit
Turnover is business income before expenses.
Profit is generally the amount remaining after allowable costs and appropriate adjustments.
Income Tax is generally based on taxable profit rather than raw turnover.
2. Missing Cash Income
Cash payments are still business income.
Not depositing the cash into a bank account does not make the income non-taxable.
3. Claiming Personal Expenses
A personal purchase does not become allowable because you used your business bank card.
4. Forgetting Side-Hustle Income
Income from freelancing, online selling, consultancy, tutoring and similar activities may still need reporting.
5. Ignoring Payments on Account
New sole traders often budget for the previous year’s tax but overlook the first advance payment for the next year.
6. Filing in January With Poor Records
Waiting until the final weeks before the deadline increases the risk of missing income, losing receipts and making errors.
7. Confusing the £1,000 Trading Allowance With the Personal Allowance
These are separate reliefs.
The £1,000 trading allowance relates to qualifying trading income.
The standard Personal Allowance for 2026/27 is £12,570.
8. Ignoring Making Tax Digital
A business may need MTD even though it has always submitted only one Self Assessment return each year.
Check qualifying gross income rather than taxable profit.
9. Assuming a Director Must Always File
Being a company director alone does not automatically mean every individual must submit Self Assessment.
The director’s actual income and tax circumstances determine whether a return is required.
10. Assuming You Can Stop Filing Without Telling HMRC
If HMRC expects a tax return and your circumstances change, ask HMRC to withdraw the requirement.
Do not simply stop filing.
Practical Self Assessment Checklist for Sole Traders
Before submitting your return, check that you have:
- Confirmed the correct tax year.
- Included all relevant business income.
- Included cash and online-platform receipts.
- Reconciled business bank transactions.
- Reviewed allowable expenses.
- Removed personal expenditure.
- Checked your accounting method.
- Included other taxable income.
- Reviewed National Insurance.
- Checked pension and Gift Aid information.
- Considered trading losses.
- Reviewed payments on account.
- Checked MTD obligations.
- Verified VAT implications separately.
- Reviewed HMRC’s final calculation.
- Saved your submitted return and confirmation.
Frequently Asked Questions About Self-Employed Self Assessment
How much can I earn self-employed before registering with HMRC?
You generally need to register as a sole trader if your gross trading income exceeds £1,000 in a tax year, although registration may also be required or beneficial in certain other circumstances.
When is my 2026/27 Self Assessment due?
The standard online filing deadline for the 2026/27 tax year is 31 January 2028.
The standard balancing tax payment is normally due on the same date.
When is the current Self Assessment deadline?
For the 2025/26 tax year, the online return and balancing tax payment are due by 31 January 2027.
Can I file my return before January?
Yes.
You can normally submit your Self Assessment return after the tax year ends.
Filing earlier allows you to establish your tax bill sooner and gives you more time to budget.
Do I need Self Assessment if I make less than £12,570?
Possibly.
The £12,570 Personal Allowance determines when Income Tax may become payable in straightforward circumstances.
It is not the Self Assessment registration threshold.
Gross self-employment income above £1,000 can trigger a registration requirement even if your eventual profit is below £12,570.
Do I need Self Assessment if I am employed?
You may.
If you also have self-employed income requiring declaration, you can complete Self Assessment even though PAYE already applies to your employment.
Can I claim the £1,000 trading allowance and business expenses?
You generally cannot deduct the £1,000 trading allowance and actual business expenses against the same qualifying trading income.
Compare both methods to identify which is more appropriate.
Do self-employed people pay Corporation Tax?
A sole trader does not pay Corporation Tax on sole trader profits.
Sole traders generally pay personal Income Tax and applicable National Insurance.
Corporation Tax applies to limited companies and certain other entities.
Do I need a business bank account for Self Assessment?
Tax law does not generally require an ordinary sole trader to maintain a separate business bank account.
However, a separate account can make bookkeeping considerably easier.
Check your bank’s terms before using a personal account for business transactions.
Is Making Tax Digital the same as Self Assessment?
No.
Making Tax Digital for Income Tax changes how qualifying sole traders and landlords maintain records and submit information within the Income Tax Self Assessment system.
Eligible taxpayers still submit an annual tax return and pay their tax by the relevant annual deadline.
Does MTD mean I pay tax four times per year?
No.
Quarterly MTD updates are reporting requirements.
They do not automatically create quarterly Income Tax payment deadlines.
Can I complete Self Assessment myself?
Yes.
Many sole traders prepare their own returns.
However, an accountant can be useful where you have:
- Several income sources.
- High turnover.
- VAT.
- Property income.
- Business losses.
- Capital gains.
- Significant equipment purchases.
- Payments on account.
- MTD requirements.
- Complex allowable expenses.
How Can Accfirm Help With Self-Employed Self Assessment?
Managing Self Assessment correctly involves more than submitting figures before 31 January.
Your bookkeeping, accounting method, expense claims, tax planning and digital reporting arrangements all influence how accurately and efficiently your tax affairs are managed.
Accfirm supports UK sole traders, freelancers, contractors and growing businesses with their accounting and tax responsibilities.
Our sole trader accountants can help with:
- Self Assessment registration.
- Preparing and submitting tax returns.
- Sole trader bookkeeping.
- Reviewing allowable expenses.
- Income Tax calculations.
- National Insurance.
- Payments on account.
- VAT registration.
- Making Tax Digital.
- Cash basis accounting.
- Tax planning.
- HMRC correspondence.
Why Use Accfirm for Your Self Assessment?
Accfirm helps self-employed individuals understand their numbers rather than simply completing a return once a year.
Keeping your accounts organised throughout the year can help you:
- Understand your profitability.
- Identify tax-deductible expenses.
- Prepare for upcoming tax payments.
- Avoid deadline pressure.
- Monitor VAT thresholds.
- Prepare for Making Tax Digital.
- Make more informed business decisions.
As your income grows, your tax affairs may become more complex.
Having a reliable accounting process in place early can make that growth easier to manage.
Final Thoughts: Stay Ahead of Your Self Assessment
Self Assessment does not need to become a January emergency.
The strongest approach is to maintain accurate business records throughout the year, understand which expenses are allowable, monitor your taxable profits and reserve money for future tax payments.
For the 2026/27 tax year, remember these key figures:
- Tax year: 6 April 2026 to 5 April 2027
- Standard Personal Allowance: £12,570
- Trading allowance: up to £1,000
- Class 4 NI main rate: 6%
- Class 4 lower profits limit: £12,570
- VAT registration threshold: £90,000
- Self Assessment registration deadline: 5 October 2027
- Online filing deadline: 31 January 2028
- Balancing payment deadline: 31 January 2028
Making Tax Digital also now applies from 6 April 2026 to qualifying sole traders and landlords whose 2024/25 qualifying income exceeded £50,000, with the threshold falling to more than £30,000 from April 2027 and more than £20,000 from April 2028.
If you are unsure about your Self Assessment obligations, allowable expenses, payments on account or Making Tax Digital requirements, speak with a qualified accountant before your filing deadline.
Accfirm can help you organise your accounts, understand your tax position and meet your HMRC obligations with confidence.