CalcBritUK numbers. Made clear.
11 free tools

Mortgage and property calculators UK

Plan a house deposit, compare mortgage payments and estimate residential property purchase taxes or rental returns.

Choose a home & property calculator

Stamp duty calculator UK: SDLT, LBTT and LTT

Calculate SDLT, Scottish LBTT or Welsh LTT by country.

Home & property

House deposit calculator UK

Turn a property price into a clear deposit target.

Home & property

Rental yield calculator UK: gross and operating

Compare gross and operating rental yields.

Home & property

Rental cash flow calculator UK

Estimate rental income left after monthly outgoings.

Home & property

Total cash to buy a home calculator UK

Add deposit, property purchase tax, legal costs, survey, moving and a chosen reserve.

Home & property

Break-even rent with void periods calculator UK

Find the occupied-month rent needed to cover annual cash costs after expected voids.

Home & property

Rental cash-on-cash return calculator UK

Compare annual before-tax rental cash flow with the actual cash invested.

Home & property

Net house sale proceeds calculator UK

Estimate sale cash remaining after mortgage redemption and selling costs.

Home & property

Renovation cost with contingency calculator UK

Add contractor, material and professional quotes with a separate chosen contingency.

Home & property

Rent a Room allowance comparison calculator UK

Compare the Rent a Room allowance with actual-cost profit for confirmed eligible receipts.

Home & property

Rental void-period loss calculator UK

Measure rent foregone and ongoing cash costs during a vacancy.

Home & property

Where to start

Begin with the deposit and property purchase tax calculators to understand upfront costs. Then compare repayment and interest-only payments before exploring overpayments or rental cash flow.

UK data and coverage

Property purchase tax depends on the country of the property: SDLT in England and Northern Ireland, LBTT in Scotland and LTT in Wales. Rates and reliefs are explained on the tax tool.

Each calculator explains the formula, includes a worked example and identifies the assumptions that can affect your result. Official rule tables and dated price references are linked on the relevant pages.

Read the data sources and calculation methodology or browse all UK calculators.

Explore another topic

Practical home & property guides

Homes & deposits

Renting vs buying in the UK: compare the full cost

Rent and a mortgage payment cover different things. Compare the cash flow, upfront money, responsibilities and flexibility.

Read the guide ↗Homes & deposits

How to save for a house deposit while renting in the UK

Start with a realistic purchase budget, find a contribution you can sustain and keep the deposit separate from other buying costs.

Read the guide ↗