Financial calculators
Mortgage Calculators
Payments, amortisation, deposits and the running cost of owning a home.
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Mortgage Calculator
Enter the purchase price, deposit, rate and term to see an estimated monthly payment. Property taxes, insurance and association fees are included so the figure reflects the whole housing cost rather than principal and interest alone.
Understanding mortgage maths
A mortgage is the largest amortising loan most people ever take on, and small changes to the inputs move the outcome by tens of thousands. These calculators model the same arithmetic a lender uses: a level monthly payment that covers interest on the outstanding balance first and reduces the principal with whatever is left.
Use them to compare deposits, terms and rates side by side before you speak to a broker. The headline payment matters less than the two figures underneath it — total interest over the life of the loan, and how quickly the balance actually falls in the early years.
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Mortgage Calculators
Mortgage Payment Calculator
Principal and interest payment on any home loan amount.
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Mortgage Calculators
Mortgage Affordability Calculator
How much house your income and debts realistically support.
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Mortgage Calculators
Mortgage Refinance Calculator
Monthly saving and break-even point on a refinance.
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Mortgage Calculators
Amortization Calculator
Full interest and principal schedule for any loan.
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Mortgage Calculators
Interest-Only Mortgage Calculator
Payments before and after an interest-only period ends.
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Mortgage Calculators
FHA Loan Calculator
FHA payment including upfront and annual mortgage insurance.
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Mortgage Calculators
VA Loan Calculator
VA payment including the one-off funding fee.
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Mortgage Calculators
USDA Loan Calculator
USDA payment including guarantee and annual fees.
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Mortgage Calculators
Home Equity Loan Calculator
Equity available and the repayment on a second-charge loan.
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Mortgage Calculators
HELOC Payment Calculator
Draw-period and repayment-period payments on a HELOC.
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Mortgage Calculators
Loan-to-Value Calculator
LTV ratio, equity and the gap to the next rate band.
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Mortgage Calculators
Down Payment Calculator
Deposit required, loan needed and time to save it.
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Mortgage Calculators
Closing Cost Calculator
Total cash needed to close, deposit included.
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Mortgage Calculators
Rent vs Buy Calculator
Total cost of renting against buying over your time horizon.
Mortgage guides
- mortgagesFixed vs. Variable Mortgage Rates: A Side-by-Side ComparisonHow rate structure affects monthly payments, total interest, and the risk you carry over a full loan term.
- mortgage-refinancingWhen Refinancing a Mortgage Changes Your Total CostHow break fees, remaining term, and the new rate combine to decide whether refinancing saves anything.
- home-loansHome Loan Deposits and Loan-to-Value Bands, ExplainedWhat a deposit changes about pricing, and why lenders group applications into LTV bands.
- creditWhat Lenders Actually See in Your Credit FileThe entries that carry weight, the ones that do not, and how long each stays on record.
Frequently asked questions
What does a mortgage calculator actually include?
Principal and interest are always modelled. Property tax, home insurance, HOA fees and mortgage insurance are added on top where you enter them, because lenders quote a monthly figure that bundles them into an escrow payment.
Why is so much of an early payment interest?
Interest is charged on the balance outstanding, and at the start that balance is at its highest. The split shifts towards principal every month as the balance falls — the amortisation schedule shows exactly when it crosses over.
Does a shorter term always cost less?
It almost always costs less in total interest but more each month. Run the same loan over 15, 20 and 30 years and compare the monthly payment against the total interest to see the trade-off in your own numbers.
Will my lender quote the same number?
Rarely to the cent. Arrangement fees, valuation costs, insurance requirements, rounding conventions and the exact day count a lender uses all shift the figure slightly. Treat the result as a close estimate.
Other calculator categories
- Loan CalculatorsRepayments, interest and payoff timing on personal and instalment lending.
- Investment CalculatorsProjected returns, contributions and long-run portfolio growth.
- Interest CalculatorsSimple and compound interest, effective rates and how balances grow.
- Retirement CalculatorsRetirement pots, contribution levels and sustainable withdrawal income.
- Tax & Income CalculatorsTake-home pay, salary conversions and estimated tax positions.
- Credit & Debt CalculatorsCard payoff timelines, consolidation maths and debt reduction strategies.
- Auto Loan CalculatorsVehicle finance payments, deposits, trade-ins and total cost of ownership.
- Insurance CalculatorsCover levels, premiums, deductibles and what a claim really costs.
- Business CalculatorsMargins, break-even points, cash flow and subscription metrics.
- Savings CalculatorsSavings goals, emergency funds and the effect of regular deposits.
Disclaimer
These calculators produce estimates for information and comparison only. Actual figures depend on the provider, fees, taxes, credit assessment and terms that apply to you. Legamoney does not provide financial advice.