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Calculators for UK founders & employers
Eight purpose-built calculators for UK founders and employers. Estimate take-home pay, startup costs, profit margins, minimum wage compliance, dividend tax, VAT, employer NI and your Self Assessment bill.
Most online calculators bury you in adverts or assume you already know the answer. These don't — each one explains its assumptions, links to the official HMRC source, and works for the most common UK setups.
Pre-launch
Startup cost
Estimate the total capital you need to launch — setup costs, monthly running costs, and a cash buffer.
OpenPricing
Profit margin
Calculate gross and net profit margins, or work out the selling price you need to hit a target margin.
OpenMost popular
Take-home pay
Compare what you'd keep as a sole trader vs a limited company on the same revenue.
OpenEmployers
Minimum wage checker
Check whether your hourly pay rates comply with the 2025/26 National Living Wage and National Minimum Wage age bands.
OpenLtd directors
Dividend tax
Work out the tax due on dividends from your limited company, including the £500 allowance.
OpenVAT-registered
VAT (inc / ex)
Add or remove VAT at standard, reduced or zero rates. Handles flat-rate scheme too.
OpenHiring
Employer NI
Estimate the National Insurance you'll pay when you hire your first employee.
OpenSole traders
Self Assessment
Estimate your Self Assessment bill plus any payments on account due in January.
OpenTax calculators use HMRC's 2025/26 rates for England, Wales and Northern Ireland. Scottish income tax bands differ — we flag this on each tool. Estimates only, not tax advice.
Partner offers
Exclusive reader offers
Two offers we genuinely recommend to UK founders. We earn a small referral fee if you sign up — you pay nothing extra.
Business bank account
Reader offerTide Business Account
£200 free cash
£75 when you complete £100 of card transactions within 30 days, plus a further £125 when you deposit £5,000 within 7 days. No credit check, open in 5 minutes.
REFER200Business credit card
Reader offerCapital on Tap business credit card
7,500 free points
Get 7,500 points (worth £75) when you complete your first card transaction within 30 days. 1% uncapped cashback. Up to £250k credit limit.
SETTINGUP18+, UK residents only. Offers are subject to each provider's terms. Tide: £75 paid after completing £100 of card transactions within 30 days of opening, plus a further £125 paid after depositing £5,000 within 7 days (total £200, code REFER200). Capital on Tap: 7,500 points (≈ £75) after first card transaction within 30 days; credit subject to status. We may receive a commission if you sign up — it doesn't change the offer to you.