Prepare your documents
Upload your bank statements, receipts and invoices. TaxEase UK reads them automatically and sorts them into expense categories - ready for your Self Assessment return.
How it works
1. Drop your files in the upload area (top-right corner)
2. Review the categories - confirm or reclassify any transactions
3. Click Start Self Assessment - all figures are pre-filled
No digital documents? Click Skip below - you can enter all figures manually.
Your documents - by category
Use the upload area in the top-right corner of the page to add receipts, invoices, P60, P11D and bank statement PDFs. Here you'll see the total per expense category - amounts are automatically copied into the matching SA form boxes.
SA100 - Page TR1
Your personal details
Page 1 of 15 - Tell us about you
The same details HMRC asks for on the first page of the Self Assessment return.
Before you start
HMRC needs to identify you. Get your UTR (10 digits, from the SA welcome letter or your gov.uk personal tax account) and your National Insurance number (on your P60, payslip or NI card) ready.
If you don't have a UTR yet, register at gov.uk/register-for-self-assessment at least 20 working days before the deadline (31 January).
Address
Identifiers
Where do I find this?
SA letter Top-right of any letter HMRC sent you about Self Assessment ("UTR: 1234567890").
gov.uk Sign in to your Personal Tax Account at gov.uk/personal-tax-account → "Self Assessment".
HMRC app Open the official HMRC app → Self Assessment tab.
Where do I find this?
P60 Top section - "National Insurance number".
Payslip Usually printed near your name and tax code.
HMRC app Profile → Identity.
Additional details
Residence and other information
SA100 - Page TR2
Which pages do you need to fill in?
HMRC asks the same screening questions. Tick every situation that applied to you between 6 April 2025 and 5 April 2026.
Why this matters
Your answers here decide which supplementary pages of the SA100 you fill in. We mirror HMRC's questions so the form numbers match exactly when you transfer your answers to gov.uk.
More information
If you worked for one or more employers in 2025-26, tick Yes. You'll need your P60 (end-of-year summary your employer gives you). Directors of limited companies also tick Yes here.
More information
Tick Yes if you worked for yourself — as a sole trader, freelancer, contractor, or gig worker (Uber, Deliveroo, Etsy, etc.). You don't need a registered company — any self-employed income counts, even occasional side work.
More information
Tick Yes if you rented out any property in the UK — even just a spare room in your own home. Airbnb and short-term holiday lets also count. If you used Rent-a-Room relief (first £7,500 tax-free), you may still need to declare it.
More information
Tick Yes if you received any income from outside the UK — salary from a foreign employer, rent from property abroad, dividends from foreign shares, or income while living overseas. UK residents must declare worldwide income, not just UK earnings.
More information
Tick Yes if you received dividends from shares or a limited company you own. The first £500 per year is tax-free — but you still need to declare it. Dividends from an ISA are fully exempt and don't count.
More information
Tick Yes if you earned interest on savings accounts, fixed-term bonds, or peer-to-peer lending. Basic rate taxpayers get a £1,000 annual allowance — anything above that is taxable. Interest earned inside an ISA is always tax-free.
More information
Tick Yes if you received a private, workplace or personal pension. The State Pension is also taxable — tick Yes if you received it in 2025-26. Your pension provider will send you a P60 or annual statement showing the total paid to you.
More information
Tick Yes if you sold shares, a second property, cryptocurrency, or other assets at a profit in 2025-26. The annual Capital Gains Tax allowance is £3,000 — gains above this are taxable. TaxEase UK will flag the total; the full CGT section is outside v1 scope.
More information
Salary on SA102, dividends on SA100 TR3.
SA102 - Employment
Income from employment
If you had more than one employer, complete this for each one. The boxes here match SA102 exactly.
What HMRC is asking for
SA102 reports pay you received from a UK employer with PAYE tax already deducted. You're not paying tax twice - HMRC is reconciling what was already taken against your total annual tax.
Have your P60 (issued by 31 May after the tax year ended) and any P11D (benefits in kind) for each employer.
About this employment
Status indicators (tick where applicable)
Pay and tax
Where do I find this?
P60 Field labelled "Pay" or "In this employment" - usually the largest figure on the P60.
Final payslip If you don't have a P60 yet, total the year-to-date gross pay from your March/April payslip.
Where do I find this?
P60 Field labelled "Tax deducted" or "Tax". Right next to the Pay figure.
Benefits and expenses (P11D)
You only need this section if your employer gave you extras like a company car, private health insurance, gym membership or interest-free loans. Your employer sends you a P11D form listing these. Most employees skip this entirely.
Expenses
Work costs you paid from your own pocket that your employer didn't pay back — for example: tools, specialist clothing, professional subscriptions, or working from home costs. If you use something for both work and personal use, only enter the work portion.
SA103S - Self-employment (short)
Self-employment income and expenses
For sole traders with turnover under £85,000. Over that threshold you must use SA103F.
What HMRC is asking for
SA103S asks for your business income (turnover) and the allowable expenses you incurred wholly and exclusively for the business. The net profit is what gets taxed.
Two ways to handle expenses: cash basis (record when money changes hands) or accruals (when invoiced/incurred). Most sole traders use cash basis.
About your business
Business income
Allowable business expenses
Enter everything you genuinely spent to run your business — phone, internet, software, office supplies, professional memberships, travel, accountant fees, etc. If you use something for both work and personal use (like your phone), only enter the work percentage. Don't include your own wages or drawings — those are not a business expense for sole traders.
Where do I find this?
Either actual fuel/insurance/repairs, OR use simplified mileage:
45p × first 10,000 mi + 25p × the rest
What else can I include in Box 19?
Allowable "other" business expenses include things that don't fit the categories above but are wholly & exclusively for your trade:
- Trade subscriptions & memberships - professional bodies, trade unions relevant to your work
- Training & CPD - courses that update existing trade skills (NOT courses to start a new trade)
- Software subscriptions - accounting (Xero, FreeAgent, QuickBooks), design tools (Adobe), CRM, hosting
- Marketing - Facebook/Google ads, business cards, flyers, website costs, SEO
- Bank charges - business account monthly fees, transaction fees (not personal account)
- Bad debts written off - invoices the customer never paid you, properly written off
- Subcontractor payments - sums paid to other self-employed people who helped you
- Use of home as office - if not using simplified method (electricity, heating, broadband proportion)
- Protective clothing & PPE - safety boots, hi-vis, helmets, masks, gloves (NOT regular clothes)
- Stationery, printing, postage - not already included above
- Vehicle parking, congestion charges, tolls - when on business trips (NOT commuting)
Not allowable: personal entertainment, regular clothing, fines, parking penalties, gym memberships, personal phone bills (only business portion), travel between home and a regular place of work, capital purchases (those go on capital allowances instead).
Capital allowances (deduction for business equipment)
Big one-off purchases (computers, machinery, vans, office equipment) are treated differently from day-to-day expenses. Enter them here — not in the expenses section above — to avoid double-counting. HMRC lets you deduct 100% of the cost in the year you buy them (Annual Investment Allowance).
All your receipts and bank statements were already processed on Step 1 (Documents). The category totals from there auto-fill the boxes above. You can override any figure manually here.
SA105 - UK Property
UK property income
Rental income from UK property and lodgers. Each property: gross rent, allowable expenses, net profit.
What HMRC is asking for
Declare rent received in the tax year (not when invoiced - for cash basis). Allowable expenses include letting agent fees, insurance, repairs (not improvements), ground rent, accountancy, finance costs (restricted relief for residential mortgages - see Box 44).
Rent a Room: first £7,500/year of rent from a furnished room in your own home is tax-free.
Furnished Holiday Lettings (FHL) (skip if not applicable)
This section is only for Airbnb-style short-term holiday lets — properties available to rent for less than 210 days per year. If you rent to long-term tenants, skip this section entirely and use the regular UK Property boxes above.
Allowable expenses
SA106 - Foreign
Foreign income
Income or gains from outside the UK. If you've already paid tax abroad, you can usually claim Foreign Tax Credit Relief - so you don't pay twice.
What HMRC is asking for
If you are UK resident and domiciled, you are taxed on your worldwide income. Foreign salaries, rentals, pensions, dividends, interest and self-employment all go on SA106.
Double taxation: the UK has agreements with most EU countries (Romania, Poland, Italy, Spain, Germany, France, Hungary, Bulgaria, Czechia). Tax paid abroad is generally credited against your UK liability.
SA100 - Page TR3 (Interest and dividends)
UK interest and dividends
Untaxed interest from banks and building societies; UK dividends from shares and funds.
Allowances to remember
Personal Savings Allowance: £1,000 (basic rate), £500 (higher rate), £0 (additional rate). Dividend Allowance: £500 for everyone in 2025-26. Only the amount above these allowances is taxed.
SA100 - Page TR3 (Pensions and state benefits)
Pensions and state benefits
State pension, occupational pensions, private pensions, and certain taxable benefits.
The State Pension is taxable but is paid without tax deducted. Your tax-free Personal Allowance is usually applied through PAYE on other pensions to collect the tax on your State Pension.
These are common income sources our users ask about - none of them are taxable, so they do NOT appear on this return:
- Universal Credit - means-tested benefit, fully tax-free. Don't add it to any box.
- Student Finance maintenance loan - repayable loan, not taxable income.
- Student grants & bursaries - generally not taxable. Specific commercial sponsorship from a future employer is taxable - that goes on SA102 as employment income.
- PIP, DLA, Attendance Allowance, Child Benefit - not taxable. (High Income Child Benefit Charge is handled separately on TR6 if income > £60,000.)
- ISA interest / dividends - fully tax-free inside an ISA. Don't add to TR3.
If you're unsure about a specific payment, leave it out and check with HMRC or an accountant.
SA100 - Page TR4 (Tax reliefs)
Paying into pensions and donating to charity
Personal pension contributions get basic-rate relief automatically. Higher-rate taxpayers reclaim the extra here through SA. Gift Aid extends your basic-rate band - higher-rate donors gain the extra 20%/25% back.
SA100 - Page TR5 (Allowances)
Personal allowances
Marriage Allowance lets a non-taxpayer transfer £1,260 of their Personal Allowance to their spouse - saving £252/year. Blind Person's Allowance gives £3,070 extra tax-free income.
SA100 - Page TR6 (Other information)
Underpaid tax, payments on account
If you had tax underpaid from a previous year that HMRC is now collecting through your tax code, enter it here. Same for payments on account already made for this year.
Built-in tax optimiser
Legal savings we found in your return
Optimisations are educational. For complex cases consult a qualified accountant.
Your calculation
Tax calculation 2025-26
Mirrors the structure of HMRC's SA302 tax calculation.
Filing on gov.uk
Now file it yourself on HMRC - step by step
Open gov.uk Self Assessment in another tab and follow this list. Every entry below tells you exactly which box to fill and the figure we calculated.
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You're ready to file
Once you've copied every figure into gov.uk's Self Assessment, HMRC will recalculate and confirm. Keep your records (P60, P11D, receipts, bank statements) for at least 5 years after 31 January 2027.
If our figures don't match HMRC's exactly to the penny, review the checklist on the previous page - usually a rounding difference or an allowance applied differently. The substance is the same.
Deadlines for the 2025-26 return
- 31 October 2026 - paper SA return
- 31 January 2027 - online SA return and tax payment
- 31 January 2027 - first payment on account for 2026-27
- 31 July 2027 - second payment on account for 2026-27