Free utilities
Free UK calculators
Useful calculators that give real numbers, not generic checklists. Estimate VAT, Corporation Tax, margins, repayment costs, deadlines and business admin dates.
UK VAT Calculator
Add VAT, remove VAT, or work out the VAT amount at 20%, 5% or a custom rate.
VAT Return Estimator
Estimate output VAT, input VAT and VAT due or reclaimable for a quarter.
Corporation Tax Estimator
Estimate UK Corporation Tax using small profits, main rate and marginal relief thresholds.
Profit After Tax Calculator
Estimate profit left after Corporation Tax and a simple reserve amount.
Margin & Markup Calculator
Convert cost, selling price, gross profit, margin and markup.
Loan Repayment Calculator
Estimate monthly repayments, total repayable and total interest.
Mortgage Estimate
Simple repayment estimate for home or commercial mortgage planning.
Rent Affordability Calculator
Estimate affordable rent using monthly income and a chosen affordability percentage.
PCN Deadline Calculator
Estimate typical discount and response date from a parking notice issue date.
Flight Delay Compensation Estimator
Estimate possible UK/EU flight delay compensation based on distance and arrival delay.
Late Payment Interest Calculator
Estimate simple statutory-style late payment interest for unpaid business invoices.
Business Deadline Calculator
Estimate Companies House confirmation statement, annual accounts and VAT quarter dates.