00 / Tools

Tools

Quick calculators for UK founders who need a first-pass answer before deciding what needs a proper review.

Useful numbers, clearly shown.

These tools are built for orientation: they show the moving parts, the assumptions and the result without pretending to replace advice.

01 / Calculators

Start with the numbers you know. Use the result as a prompt for proper review.

Compare simplified 2026/27 take-home pay as a sole trader and as a limited company, then use the checklist to weigh liability, credibility and admin.

Estimate UK Corporation Tax after marginal relief, associated companies and short accounting periods.

Estimate monthly payments, lifetime interest and how much overpayments could save.

Track business journeys, calculate the HMRC mileage claim automatically, and export a clean PDF or CSV log for your records.

End of page · Tools Lean Ledger