SoleTrader Tools
Figures for the 2026/27 tax year

The essential toolkit for UK sole traders

SoleTrader Tools is an editorial site first: we explain how UK Income Tax, National Insurance, and VAT interact for freelancers and one-person businesses, then we give you calculators to turn those rules into numbers you can use in real life — whether you are pricing a day rate, saving for January, or checking how close you are to VAT registration.

Nothing here replaces an accountant or HMRC, but it does replace guesswork. Every tool is paired with plain-English context on the same page so you understand what the inputs mean, what the bands are for 2026/27, and where to read the official guidance we rely on.

Who this site is for — and what problem it solves

If you invoice clients under your own name, file a Self Assessment return, and pay Income Tax and Class 4 National Insurance on profit (not turnover), you are the reader we had in mind. The same goes for side-income alongside PAYE: combining bands is confusing, and our sole-trader tax and take-home tools are written to reflect that stacking explicitly rather than hiding it behind a single “magic percentage.”

VAT is a separate rhythm: most goods and services use a rolling twelve-month turnover test against the £90,000 registration threshold, not the April-to-April tax-year calendar. Our threshold checker and VAT guides spell out that difference because it is the mistake we see most often from otherwise careful businesses.

We publish both calculators and guides because the calculators answer “what number?” while the guides answer “why does HMRC think that?” Together they give search engines and human readers the same thing: evidence that a human editor has structured the topic, linked to GOV.UK sources, and left a trail of sentences — not just a grid of icons.

Browse by goal

Each path mixes tools and reading so you never land on a “dead end” page with only buttons.

Work out my tax

For 2026/27, most sole traders get a £12,570 Personal Allowance (tapered above £100,000 total income), then pay 20% Income Tax on taxable profit up to £50,270, with higher and additional rates above that. Class 4 NI is charged on profit too — so your “tax bill” is rarely just Income Tax in isolation.

Set my rates and cash flow

Day and hourly rates are easy to quote; annual tax is harder. We default sensible billable weeks so you do not accidentally multiply by fifty-two as if every week were paid.

  • Day rate to annual

    Converts contractor-style day rates into a realistic gross year, then applies sole-trader tax rules to the result.

  • Weekly tax set-aside

    Turns your estimated liability into a standing order you can automate the day an invoice clears.

  • How much tax to set aside

    Why flat percentages fail and how to tie savings to your real return instead.

Plan for VAT

Registration is driven by VAT-taxable turnover in any rolling twelve months, not by your Self Assessment profit alone. Crossing the line triggers a short registration window — check monthly if you are growing quickly.

  • VAT threshold checker

    Type your rolling twelve-month turnover to see headroom against the £90,000 limit.

  • Add or remove VAT

    Practise net and gross figures at 20%, 5%, or 0% before you change how you quote clients.

  • When to register for VAT

    Rolling tests, voluntary registration trade-offs, and what changes operationally after you sign up.

Featured calculators

Start with the three tools visitors use most, then open the full library of 17 calculators covering CIS, mileage, pensions, Scotland vs England & Wales comparisons, and more.

Self-employed tax

Calculate your 2026/27 Self Assessment-style liability on profit: Income Tax through the UK bands (with Personal Allowance taper where it applies) plus Class 4 National Insurance on the same profit figure. Use it after you have deducted allowable expenses — the number in the box should be taxable profit, not turnover.

Take-home pay

Income Tax and NI are only part of what leaves your account. This calculator layers student loan repayments and pension contributions so you can see a realistic monthly figure after the deductions you actually make — useful when comparing freelance life to a PAYE offer on paper.

VAT threshold

If your VAT-taxable turnover crosses £90,000 in any rolling twelve-month period you must register with HMRC (subject to limited exceptions). The checker is a sanity test, not a filing — keep your own rolling spreadsheet if you are near the line.

Guide spotlight

How to estimate your self employed tax bill

Start from a defensible profit figure — your invoices minus costs you can defend to HMRC — then run that number through Income Tax and Class 4 NI together. If you also have PAYE income, bands apply to the combined total, which is why a standalone “side income” percentage often lies to you. Once you trust the annual answer, split it into weekly savings so January is a transfer, not a crisis.

Our short guide walks the steps in order, links the calculators you need at each stage, and includes FAQs in plain English so you can skim or deep-read in one sitting.

UK tax snapshot

What we are watching on GOV.UK

  • Thresholds and rates for Income Tax, NI, and VAT can change at fiscal events. We align calculator defaults to the 2026/27 figures published on GOV.UK and note in-tool when a rule is illustrative only.
  • Making Tax Digital already applies to VAT; wider MTD rules for Income Tax Self Assessment are on a phased timetable — check HMRC if you are in a pilot cohort.
  • Scottish Income Tax uses different bands from England and Wales on non-savings, non-dividend income; our Scotland vs rUK estimator compares the same profit under both models.

We do not publish breaking “news headlines” here; we summarise stable facts and point you to official sources when policy moves.

Tax basics & Self Assessment

Start with the HMRC basics

New sole traders usually need the same sequence first: register, understand Self Assessment, estimate the tax stack, then plan for January and July deadlines.

How to register as a sole trader with HMRCSole trader Self Assessment beginner's guideSole trader tax rates and thresholds for 2025/26What are payments on account?Key HMRC dates for sole traders in 2025/26

Expenses & Allowances

Reduce profit with allowable business costs

Expenses are where many sole traders either overpay tax or make unsupported claims. Start with the HMRC rules, then use the calculators to model mileage, home office costs, and profit after deductions.

What expenses can sole traders claim in 2025/26?Mileage allowance: the 45p/25p ruleWorking from home as a sole traderTrading allowance or actual expenses?Annual Investment Allowance for sole traders

Making Tax Digital

Get ready for MTD before April 2026

MTD for Income Tax brings digital records, quarterly updates, and software decisions for higher-income sole traders. These guides explain who is affected and what to prepare now.

Making Tax Digital for sole traders from April 2026FreeAgent vs QuickBooks vs Xero for MTDWhat goes into MTD quarterly updates?

VAT & Business Setup

Handle VAT, structure, staff, and invoices

As a sole trader grows, setup decisions become tax and cash-flow decisions. These guides cover the £90,000 VAT threshold, incorporation, payroll duties, and invoice essentials.

Do I need to register for VAT as a sole trader?Sole trader vs limited company in 2025Can a sole trader employ staff?How to invoice as a sole trader

National Insurance, Pension & Benefits

Plan beyond this year's tax bill

Sole trader planning is not only Income Tax. These guides explain Class 2 and Class 4 National Insurance, pension tax relief, and Maternity Allowance for self-employed people.

Class 2 and Class 4 NI in 2025/26Sole trader pension and tax reliefMaternity pay for sole traders

Record-Keeping, Compliance & HMRC Investigations

Make your Self Assessment records defensible

Clean records reduce stress when filing and make HMRC questions easier to answer. These guides cover retention rules, penalties, appeals, and choosing an accounting basis.

Record-keeping for sole tradersHMRC penalties and appealsCash basis vs traditional accounting

Practical Tool Guides

Turn calculator results into filing decisions

These walkthroughs show how to move from raw income and expenses to a take-home estimate, then prepare the records and checks needed for a first Self Assessment return.

Calculate sole trader take-home pay step by stepFirst Self Assessment tax return checklist

Plain English guides

Long-form articles sit alongside tools so crawlers and readers see the same editorial spine: explain, then calculate. VAT registration, National Insurance classes, set-aside habits, and Self Assessment deadlines all have dedicated guides with calculator call-outs inside the page.

How self-employed tax works

Personal Allowance, bands, and how your final bill is built.

Class 2 and Class 4 NI explained

How both classes work for sole traders, with calculators and official sources.

When and how to register for VAT

Rolling turnover, MTD records, and what changes after registration.

Self Assessment deadlines

Filing dates, payments on account, and why January feels expensive.

Related tools

Income & Take-home

Self-employed tax

Open

Income & Take-home

Take-home pay

Open

VAT

VAT threshold checker

Open

Income & Take-home

Weekly tax set-aside

Open

Methodology & sources

Rates and thresholds for Income Tax, National Insurance, and VAT follow GOV.UK publications for the tax year shown in the site header (2026/27). Where we simplify — for example illustrative corporation tax in structure comparisons — we label the limitation in the tool and in the long copy on the same page. When HMRC updates figures after a Budget, we refresh constants and re-run checks against our regression scenarios before publishing.

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SoleTrader Tools

Free, fast, and accurate tax calculators for UK sole traders, freelancers, and contractors.

Disclaimer: This is a guidance estimate based on the 2026/27 tax year. It is not personal tax advice — consult an accountant or HMRC for your specific circumstances.

© 2026 SoleTrader Tools