Use the Home Loan Calculator above to estimate regular repayments based on the loan details you enter. Adjust the loan amount, interest rate, repayment period and any other available inputs to see how different assumptions change the result.
A small change in the interest rate or loan term can make a meaningful difference to what you pay over time. Use the calculator to compare scenarios before choosing a property or discussing a mortgage with a lender. The result is an estimate, not a mortgage offer or a decision about how much a lender will approve.
How to use the home loan calculator
- Enter the loan amount. Use the amount you expect to borrow. If the calculator asks for the property price and your deposit or down payment, enter those figures so the loan amount can be estimated.
- Add the interest rate. When you have a lender’s quote, use that rate. Before then, test a few plausible rates rather than relying on one optimistic assumption.
- Choose the repayment period. This is the period used by the calculator to spread repayments. Make sure it matches the loan type and term you are considering.
- Complete any additional fields shown. If the calculator offers inputs for repayment frequency, fees, taxes or insurance, enter realistic estimates. If those fields are not available, treat those costs separately.
- Compare more than one scenario. Try a larger deposit, a different interest rate and a shorter or longer term. Look at how the repayment changes, but also consider the total interest and the cash you would have left each month.
For a useful comparison, change one input at a time. That makes it easier to see what is causing the result to move.
What does a home loan repayment include?
For a typical principal-and-interest home loan, each repayment covers two things: principal, which reduces the amount you borrowed, and interest, which is the cost of borrowing. Early in a fully amortising loan, a larger share of the repayment usually goes toward interest. As the balance declines, more of each repayment goes toward principal.
The repayment shown by a basic home loan calculator may cover only principal and interest. Your actual housing costs can be higher. Depending on where you live and the loan you choose, additional costs may include:
- Property taxes or other local property charges
- Home or building insurance
- Mortgage or loan insurance, where required
- Homeowners’ association, condominium or service charges
- Lender fees and other costs connected with the loan
- Maintenance, repairs, utilities and other costs of owning a home
The U.S. Consumer Financial Protection Bureau explains that a total monthly mortgage payment can include principal, interest, property taxes, homeowners’ insurance and, where applicable, mortgage insurance and association fees. Check its guide to estimating the full cost of homeownership.
Do not treat the calculator’s repayment figure as the full cost of owning the property unless the tool clearly includes all relevant costs. If taxes, insurance, fees or other charges are not part of the calculation, estimate them separately and add them to your monthly housing budget.
How the calculation works
For a standard repayment loan with a fixed interest rate, the regular payment is calculated from the amount borrowed, the interest rate applied to each payment period and the number of payments over the loan’s repayment period. The calculation spreads repayment of principal and interest across that schedule.
The estimate depends on the assumptions entered. If your rate changes, the loan uses a different repayment structure or the lender applies fees that are not included, your actual payment can differ. Interest-only loans also work differently: the regular payment may cover interest without paying down the principal, which still has to be repaid under the loan agreement.
The MoneyHelper mortgage repayment guide explains the difference between repayment and interest-only mortgages in the UK. If you are comparing Canadian mortgages, the Financial Consumer Agency of Canada guide to mortgage terms and amortization explains why the contract term and the period used to repay the balance are not necessarily the same thing.
How the interest rate and loan term affect your payment
Three inputs usually have the largest effect on the repayment estimate.
Amount borrowed
A larger loan generally means a larger repayment, all else being equal. A bigger deposit or down payment usually reduces the amount you need to borrow, though you should keep enough accessible savings for emergencies, closing costs and moving expenses.
Interest rate
A higher interest rate generally increases the cost of borrowing. When comparing mortgage offers, use the rate and loan terms quoted to you, and check whether the rate is fixed for the full period or can change. If you are considering a variable-rate loan, test how your budget would look if the rate rose.
Repayment period
A longer repayment period generally lowers each scheduled payment because the balance is spread over more payments. It can also increase the total interest paid over the life of the loan. A shorter period generally means higher regular payments but less time for interest to accumulate. The best comparison is not just the smallest monthly figure; it is a payment you can manage alongside the rest of your financial commitments.
How much home loan can you afford?
A repayment estimate is only one part of affordability. Before deciding what price range to consider, build a realistic monthly budget that includes your take-home income, existing debt repayments, essential expenses, savings goals and likely homeownership costs.
Leave room for costs that are easy to overlook: repairs, maintenance, utility bills, insurance renewals, moving costs and changes in income. A lender may approve a loan amount that still feels uncomfortable once all of your household expenses are included.
A home loan calculator estimates the result of the assumptions you enter. It does not check your credit history, verify your income, assess your other debts or determine whether a lender will approve an application. For a more grounded estimate, the CFPB recommends starting with the total monthly home payment you can reasonably afford and working backward from that amount. Read its guide to deciding how much to spend on a home.
Costs to check outside the calculator
Before making an offer on a property, ask the lender or a qualified local professional for a breakdown of costs. Depending on your country and property, you may need to account for:
- Legal, conveyancing or closing costs
- Valuation, inspection or survey charges
- Stamp duty, transfer taxes or similar government charges
- Lender establishment, application or arrangement fees
- Mortgage insurance or other required cover
- Ongoing property taxes, insurance, service charges and maintenance
Some costs are paid upfront; others recur monthly or annually. Do not add an upfront cost to a monthly repayment figure without first converting it to a comparable period. Keep a separate amount available for closing and moving costs rather than assuming all of your savings can go toward the deposit.
Compare home loan options before deciding
Use the calculator to answer specific questions, not just to find the lowest displayed payment:
- What happens to the repayment if the interest rate is one percentage point higher?
- How much does increasing the deposit reduce the amount borrowed?
- What is the trade-off between a shorter repayment period and a lower monthly payment?
- If you pay fees upfront or add them to the loan, how does that change the borrowing cost?
- Would the payment remain manageable if other household expenses increased?
When you have offers from lenders, compare them using the same loan amount, rate type and repayment period. Review the fees and other conditions as well as the advertised rate. In the United States, the CFPB explains how to compare mortgage Loan Estimates. In Australia, Moneysmart’s mortgage calculator also highlights that calculator results are estimates and depend on the inputs and assumptions used.
Home loan information by country
Mortgage terminology, fees, taxes and lending rules differ between countries. Use the local guidance that matches the property and loan you are considering:
- United States: Check whether your estimate includes property taxes, homeowners’ insurance, mortgage insurance and any homeowners’ association fees.
- United Kingdom: Confirm whether you are comparing a repayment or interest-only mortgage, and whether the rate is fixed or variable.
- Canada: Distinguish the mortgage term from the amortization period, and check the payment schedule and renewal conditions.
- Australia: Check the repayment frequency, fees and whether the loan is principal-and-interest or interest-only.
You can browse all of SmartGrowthInvest’s country-specific financial guides for more local context. For budgeting, saving and other money decisions before buying a home, explore our Personal Finance guides.
Frequently asked questions
How accurate is a home loan calculator?
It can calculate an estimate based on the information and assumptions entered. Your lender’s actual repayment may differ because of the offered rate, fees, repayment frequency, loan structure and other conditions. Use the result to compare scenarios, not as a binding quote.
Does the calculator include taxes and insurance?
That depends on the fields and calculations available in the tool. If you do not see inputs or separate results for property taxes, home insurance, mortgage insurance or local charges, assume they are not included and add them to your own budget separately.
Does a longer home loan term reduce the total cost?
Not usually. A longer repayment period can reduce the scheduled payment, but it generally means paying interest for longer. Compare both the regular payment and the total interest over the period you expect to keep the loan.
Can this calculator tell me how much a bank will lend me?
No. A repayment calculator estimates payments from the figures entered. Lenders also assess income, expenses, existing debts, credit history, deposit and the type of property and loan. Approval and borrowing limits are determined by the lender.
What is the difference between principal and interest?
Principal is the amount borrowed. Interest is the charge for borrowing it. With a principal-and-interest loan, each regular payment covers interest and pays down part of the principal. An interest-only loan may not reduce the principal during the interest-only period.
Should I choose the longest loan term available?
Not automatically. A longer term may produce a smaller regular payment but can increase the total interest paid. Compare different terms against your budget and longer-term financial plans, and check whether overpayments or early repayment could trigger restrictions or fees.
Important note
This calculator is an educational planning tool. Its results are estimates based on the details entered and may not include every cost associated with buying or owning a home. It does not provide mortgage approval, a loan offer or personalised financial advice. Interest rates, lender criteria, taxes, fees and product conditions vary by country and can change. Confirm the details with the lender and relevant local authorities before making a financial commitment.