UK calculators
Mortgage and stamp duty tools plus HMRC Self Assessment estimates for UK freelancers and sole traders.
Mortgage & stamp duty
Stamp Duty Calculator
Free SDLT calculator — how much stamp duty will I pay?
Open calculator →Mortgage Repayment Calculator UK
Monthly capital repayment in GBP.
Open calculator →Buy to Let Stamp Duty Calculator
BTL SDLT with 5% additional-property surcharge.
Open calculator →SDLT Calculator UK
Stamp Duty Land Tax calculator for England & NI.
Open calculator →Second Home Stamp Duty Calculator
Additional property SDLT for holiday homes.
Open calculator →UK Amortization Calculator
Repayment schedule for UK fixed-rate mortgages.
Open calculator →Self-employed tax
Stamp duty by property price
Popular mortgage scenarios
UK mortgages and stamp duty
UK repayment mortgages pay down capital and interest each month. Our calculator supports repayment and interest-only modes, with amortization schedules on the dedicated schedule tool.
Stamp Duty Land Tax (SDLT) applies in England and Northern Ireland with progressive bands, first-time buyer relief, and additional-property surcharges. Scotland and Wales use separate taxes (LBTT and LTT).
Self Assessment for sole traders
Self-employed profits are taxed through HMRC Self Assessment, including Class 4 National Insurance on earnings above the lower profit threshold. Payment on account may apply when your bill exceeds £1,000.
Keep business records aligned with HMRC allowable expense rules. This estimator is a planning aid — not a substitute for an accountant or HMRC's own calculation.