UK tax calculators for sole traders
Seven focused tools for the most common questions UK sole traders ask at tax time. Each one runs in your browser, uses current HMRC rates and thresholds, and links back to the gov.uk pages it draws from.
HMRC Mileage Calculator
Work out your business-mileage deduction using HMRC's approved AMAP rates. Covers cars, motorcycles and bicycles, plus the passenger supplement.
- 45p first 10,000 miles, 25p thereafter (cars)
- Motorcycle 24p, bicycle 20p
- Adds passenger supplement at 5p/mile
VAT Threshold + Flat Rate Calculator
Two tools in one. Check whether your rolling 12-month turnover crosses the £90,000 registration threshold, then compare standard VAT against the Flat Rate Scheme for your trade.
- £90,000 registration check
- Flat Rate Scheme comparison by sector
- Automatic Limited Cost Trader detection
CIS Deduction Calculator
For construction subcontractors. Work out the deduction on your invoice at 20%, 30% or 0% (Gross Payment Status), with the materials carve-out and VAT handled separately.
- 20% registered, 30% unverified, 0% gross
- Materials excluded from CIS
- Includes gov.uk references
Sole Trader vs Limited Company
Enter your annual profit and see the take-home difference between running as a sole trader and a single-director Ltd company taking salary plus dividends.
- Income Tax, Class 4 NIC and dividend tax
- Corporation Tax with marginal relief
- Employer NI included
MTD ITSA Quarterly Forecaster
Project your year-end tax bill from quarterly profit figures, and see every MTD ITSA submission deadline plus the Self Assessment payments-on-account schedule for 2026/27.
- Income Tax + Class 4 NIC projection
- Quarterly submission deadlines
- Payments on account dates
Will I Get Fined? MTD Penalty Calculator
Live estimate of HMRC's late-submission points, late-payment penalty, and 7.75% interest under the post-April 2025 regime. Covers the 2026/27 soft-landing and the full 2027/28+ rules.
- Points threshold and £200 fixed fines
- 6% (2026/27) vs 8% (2027/28+) late-payment hit
- 10% daily-annualised + 7.75% interest stack
MTD ITSA Join Date + Deadline Checker
Do you have to use MTD for Income Tax — and when? Enter your gross qualifying income for 2024/25, 2025/26 and 2026/27 and the tool returns your exact join date, every quarterly deadline, and your Final Declaration date.
- £50k / £30k / £20k threshold logic
- Tests the correct year for each phase
- Full deadline calendar once you're in
How these are built. Every rate, threshold and deadline is taken from gov.uk for the 2026/27 tax year. The calculators run entirely in your browser — nothing you enter is sent anywhere or stored. They're indicative estimates, not formal tax advice, and they don't replace a conversation with your accountant. If you spot a figure that looks off, email hello@pocketreceipt.co.uk.
Records sorted, not just calculated
These tools answer one question at a time. PocketReceipt keeps the underlying records — receipts, mileage, categories — that you need to plug in the numbers in the first place. Free on iOS and Android.