Real Estate Calculators
Property tax, rental yield, mortgage & affordability calculators.
What Are Real Estate Calculators?
Real estate calculators help buyers, sellers, investors, and landlords make sense of the numbers behind property decisions. Property is typically the largest financial commitment most people make, and the calculations involved — mortgage repayments, rental yields, affordability limits, tax implications, and investment returns — have a profound impact on long-term financial wellbeing.
Mortgage and affordability calculations are where most property journeys begin. A mortgage calculator shows what your monthly repayment will be at a given loan amount, interest rate, and term. The interest rate has a disproportionate effect: a 1% rise on a £300,000 mortgage over 25 years adds over £150 per month to repayments and tens of thousands to total interest paid. Use the affordability calculator to work backwards from your budget to the maximum borrowing that remains financially manageable.
Rental yield is the key metric for buy-to-let investors. Gross rental yield is simply annual rent divided by property value, expressed as a percentage. Net rental yield adjusts for letting fees, maintenance, insurance, and voids. Rental yield tells you whether a property generates enough income relative to its price — in many urban markets, low yields are compensated by capital growth expectations, while in regional markets higher yields reflect lower capital growth prospects.
Property investment analysis extends beyond yield to cover cash flow (rental income minus all costs), equity accumulation (principal reduction plus price appreciation), and total return on investment. The rent-vs-buy calculator compares the long-run cost of renting against buying, factoring in opportunity cost, maintenance, transaction costs, and expected house price growth.
Property tax, stamp duty, land transfer tax, and capital gains calculations round out the picture for both homebuyers and investors. These transaction costs are often underestimated and can add several percentage points to the true cost of a purchase. Our property tax and stamp duty calculators display the full cost breakdown for any purchase price.
All Real Estate Calculators (6)
Property Tax Calculator
Calculate your annual and monthly property tax based on assessed home value and local tax rate.
Rental Yield Calculator
Calculate gross and net rental yield on investment properties to evaluate rental income performance.
Rent Affordability Calculator
Find out how much rent you can afford based on your monthly income and expenses.
House Affordability Calculator
Calculate how much house you can afford based on your income, debts, and down payment.
Down Payment Calculator
Calculate the required down payment for a home purchase and see how different percentages affect your mortgage.
Mortgage Refinance Calculator
Calculate potential savings from refinancing your mortgage with a new interest rate and loan term.
Real Estate Calculator Guides
Mortgage & Affordability
The mortgage payment formula is the same EMI formula used for all loan repayments: M = P × r × (1 + r)^n ÷ [(1 + r)^n − 1], where P is the loan amount, r is the monthly interest rate, and n is the number of monthly payments. A standard 25-year mortgage at 5% on £300,000 gives a monthly payment of approximately £1,753; at 6%, this rises to £1,933 — a difference of £180 per month and over £54,000 over the full term.
Mortgage refinancing calculators help existing homeowners evaluate whether it is worth paying early repayment charges to switch to a lower rate. Enter your current balance, remaining term, current rate, new rate, and switching costs to see the monthly saving, break-even period, and total interest saving over the remaining term.
Property Investment
Gross rental yield = (Annual Rent ÷ Property Value) × 100. Net yield subtracts annual costs (management fees, maintenance, insurance, ground rent, service charges, voids) from the annual rent before dividing by value. For a £250,000 property renting at £1,200/month: gross yield = (14,400 ÷ 250,000) × 100 = 5.76%. If annual costs are £2,000, net yield drops to (12,400 ÷ 250,000) × 100 = 4.96%.
Capital gains on property are subject to CGT on disposal. Use our property CGT calculator to estimate the tax payable after applying the annual exemption and the applicable rate (18% or 24% for UK residential property at basic and higher/additional rates respectively). Factor this into your total return calculation when evaluating investment prospects.
Rent vs Buy Analysis
The rent-vs-buy decision involves comparing all costs of buying — mortgage interest, maintenance (typically 1–2% of property value annually), insurance, transaction costs — against the cost of renting while investing the equivalent down payment and ongoing cost differential. House price appreciation and rental cost inflation both affect which option wins over time.
In general, buying tends to outperform renting when the ownership horizon is long (10+ years), transaction costs are low relative to property value, mortgage rates are significantly below equivalent rental yield, and the area has a history of real capital appreciation. Our rent-vs-buy calculator models all these variables to give you a personalised break-even horizon.
Top Real Estate Calculators
Mortgage Calculator
Calculate monthly mortgage payments with full amortisation schedule for any loan amount, rate, and term.
Rental Yield Calculator
Calculate gross and net rental yield and evaluate buy-to-let investment performance instantly.
Rent vs Buy Calculator
Compare the full long-run cost of renting vs buying in your local market with personalised inputs.
Property Tax Calculator
Estimate stamp duty, land transfer tax, or property tax for any purchase price in supported jurisdictions.
Mortgage Refinance Calculator
Find out whether refinancing saves money after accounting for early repayment charges and switching costs.
Key Formulas & References
Monthly Mortgage Payment
M = P × r × (1+r)ⁿ ÷ [(1+r)ⁿ − 1]
P = loan amount, r = monthly rate, n = number of payments
Gross Rental Yield
(Annual Rent ÷ Property Value) × 100
Net yield further deducts all annual running costs
Loan-to-Value (LTV)
(Mortgage Amount ÷ Property Value) × 100
Lower LTV = lower rate risk for the lender
Frequently Asked Questions About Real Estate Calculators
Monthly mortgage payment = P × r × (1 + r)^n ÷ [(1 + r)^n − 1], where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12), and n is the number of months. This amortisation formula ensures equal payments over the full term, with an increasing proportion going to principal and a decreasing proportion to interest over time.
Gross rental yield = (Annual Rent ÷ Property Value) × 100. A yield above 5–6% gross is generally considered reasonable for a buy-to-let investment in the UK, though net yields after costs are typically 1–2% lower. In high-demand urban areas yields may be 3–4% with capital growth compensating; in regional markets yields of 7–9% are achievable but capital growth may be lower.
Most lenders require a minimum 5–10% deposit for residential mortgages, though a 20% or larger deposit unlocks better interest rates and avoids Loan-to-Value (LTV) premiums. For buy-to-let mortgages, most lenders require a minimum 25% deposit. Our affordability calculator shows the impact of different deposit sizes on monthly repayments and total interest cost.
LTV = (Mortgage Amount ÷ Property Value) × 100. A £240,000 mortgage on a £300,000 property gives an LTV of 80%. Lower LTV ratios typically attract lower interest rates because the lender has more security. Most mortgage rate tiers are set at 60%, 75%, 80%, 85%, and 90% LTV thresholds.
It depends on your circumstances, the local market, and your time horizon. Buying builds equity and protects against rent increases but involves high transaction costs and maintenance. Renting offers flexibility and avoids maintenance obligations. Buying generally becomes more advantageous over longer time horizons where transaction costs are spread over more years of ownership. Use our rent-vs-buy calculator to model your specific situation.
Beyond the purchase price, budget for: stamp duty or land transfer tax (varies by price and buyer status), solicitor/conveyancing fees (£1,000–£3,000), survey costs (£400–£1,500), mortgage arrangement fee (£0–£2,000), removal costs, and initial renovation or furnishing. Total transaction costs typically add 3–5% to the purchase price.
Property tax varies significantly by jurisdiction. In the UK, Stamp Duty Land Tax is tiered by purchase price. In the US, property tax is calculated annually as a percentage of assessed value (varying by county). Our property tax calculators use the current rates and thresholds for the relevant jurisdiction.
BrainyCalculators Editorial Team
Our Real Estate calculators are researched, built, and reviewed by the BrainyCalculators editorial team using industry-standard formulas and validated against authoritative references. Results are updated whenever underlying standards, rates, or guidelines change. All calculators are free, require no account, and run entirely in your browser.