What counts as an allowable business expense?

HMRC allows expenses that are "wholly and exclusively" for business purposes — stock and materials, office costs, travel, staff costs, marketing, professional subscriptions and software. TaxGo categorises your receipts and flags anything that might not qualify.

Do I need to register as self-employed before filing?

Yes — you need to register with HMRC for Self Assessment as a sole trader. Once registered, you'll receive your UTR (Unique Taxpayer Reference), which you'll need for your return.

Can I use TaxGo if I'm employed and self-employed?

Yes. Upload your P60 for your job and your business documents for self-employment. TaxGo combines both on one return and calculates the total tax and NI due.

Self-employed

Your business.Your figures.Our problem.

Upload your profit and loss, invoices or bank statements. TaxGo builds your self-employment section and calculates your income tax and Class 4 NI.

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£49per return No upfront payment Private document storage Built for UK Self Assessment

Your documents

Illustrative

Profit & loss
Turnover · £58,400
Expenses
Allowable costs · £9,150
Bank statement
Matched to turnover

Your TaxGo return · 2025/26

Self-employment

Turnover£58,400

Expenses−£9,150

Profit£49,250

Tax & NI

Income tax£7,336.00

Class 4 NI£2,200.80

Estimated total due£9,536.80

Illustrative 2025/26 estimate. Excludes payments on account.

What you'll need

The documentsTaxGo readsfor you.

PDF, photo or scan. Don't rename them, don't sort them. Just drop them in.

Profit & loss
Your annual P&L summary showing turnover, costs and net profit
Invoices
Sales invoices showing income received from your clients
Bank statements
Business bank statements showing income and outgoings

How TaxGo handles it

01
Turnover, totalled
Upload your invoices or P&L and TaxGo totals your business turnover. Figures you already have are never typed in twice.
02
Allowable expenses
From office supplies to travel, TaxGo sorts your business expenses into HMRC's expense categories and flags anything that might not qualify.
03
Class 4 National Insurance
TaxGo calculates Class 4 NI on your profits with the correct thresholds, and tells you if voluntary Class 2 contributions might be worth considering.
04
Trading income allowance
If your gross trading income is under £1,000, the trading allowance may cover it. For larger incomes, TaxGo checks whether the allowance or actual expenses gives you the better result.

What we support

Covered.Properly.

If your return needs something TaxGo doesn't handle yet, we tell you before you pay.

Everything TaxGo supports →

Sole trader income and expenses
Profit and loss extraction
Business bank statement analysis
Allowable expense categorisation
Class 4 National Insurance
Trading income allowance
Simple capital allowances
Use of home as office

Common questions

Asked andanswered.

HMRC allows expenses that are "wholly and exclusively" for business purposes — stock and materials, office costs, travel, staff costs, marketing, professional subscriptions and software. TaxGo categorises your receipts and flags anything that might not qualify.

Your tax return isn't going to do itself.

Actually, TaxGo gets pretty close.

Start my returnSee how it works