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Mortgage & Property Investment Calculators
A mortgage calculator shows the payment, affordability and true cost of buying and owning a home before you sign.
A mortgage calculator is a free tool that shows the monthly payment, total interest and affordability of a home loan. A home is the biggest purchase most people make, and the mortgage behind it runs for decades. A slightly better rate or a bigger down payment saves tens of thousands over the loan.
This hub covers the whole journey: what you can afford, the monthly payment, the up-front costs, whether to refinance, and the return on a rental. Start with affordability, then use the payment tools to see the full cost. For other borrowing, see the loan calculators.
All Mortgage Calculators
This page links fifteen mortgage and property calculators, grouped by stage. Each card opens one tool.
Which Mortgage Calculator Do I Need?
Match your goal to a tool in the table below. Each row names one task and the calculator that handles it.
| If You Want To... | Use This Calculator |
|---|---|
| See what home or mortgage you can afford | Home or Mortgage Affordability Calculator |
| Work out the monthly payment | Mortgage or Mortgage Payment Calculator |
| See the year-by-year breakdown | Mortgage Amortization Calculator |
| Pay the loan off faster | Mortgage Payoff or Biweekly Mortgage Calculator |
| Decide whether to refinance | Mortgage Refinance Calculator |
| Choose a loan term | 15 vs 30 Year Mortgage Calculator |
| Plan the up-front cash | Down Payment, Closing Costs or PMI Calculator |
| Weigh buying against renting | Rent vs Buy Calculator |
| Judge an investment property | Real Estate ROI Calculator |
What Are the Stages of a Home Purchase?
Buying a home moves through four stages on this page. Each stage has its own tools.
Affordability
Affordability tools work out the price and mortgage your income and deposit support, before you shop.
The Mortgage
Payment, amortization and term tools show the real long-term cost of the loan.
Up-Front Costs
Down payment, closing costs and PMI decide how much cash you need on day one.
Owning and Investing
Equity, refinancing and rental-return tools cover life after the purchase.
Rental Yield and Buy vs Rent
If you are buying to invest, rental yield measures the annual return: divide yearly rent by the property price and multiply by 100. A gross yield of 5 to 8 percent is often seen as healthy, though maintenance, void periods and tax reduce the net figure.
To choose between buying and renting to live in, compare the full monthly cost of owning - mortgage, insurance, maintenance and property taxes - against local rent, then weigh how long you plan to stay. Owning usually wins over longer horizons once you build equity.
How Is a Mortgage Repaid?
A mortgage is repaid as an amortized loan, so you pay the same amount each month while the split shifts over time. Early payments are mostly interest and later payments are mostly principal.
Extra payments early on, or a shorter term, save the most because they cut principal before years of interest build on it. Affordability tools work the other way, starting from your income to find a sustainable payment.
What Do the Key Mortgage Terms Mean?
Seven terms decide what a mortgage costs. Each definition below states the term in one line.
- Principal
- Principal is the amount you borrow to buy the home, before interest.
- Down Payment
- A down payment is the cash you pay up front, which reduces the amount financed and can remove PMI.
- Amortization
- Amortization is the schedule that splits each payment between interest and principal over the term.
- PMI
- PMI is private mortgage insurance, usually required when the deposit is under 20 percent.
- Closing Costs
- Closing costs are one-off fees due at completion, typically a few percent of the price.
- Home Equity
- Home equity is the part of the home you own, its value minus the mortgage still owed.
- Refinancing
- Refinancing is replacing your mortgage with a new one, usually to lower the rate or payment.
Frequently Asked Questions
How much deposit do I need to buy a home?
A typical deposit is 5 to 20 percent of the property price. A larger deposit lowers your monthly payment and can avoid mortgage insurance, while low-deposit options let you buy sooner at a higher rate.
What is a good rental yield?
A gross rental yield of about 5 to 8 percent is often considered healthy, though it varies by location. Divide the annual rent by the property price and multiply by 100 to find the yield.
How much can I borrow for a mortgage?
Lenders typically offer around 4 to 4.5 times your annual income, adjusted for your deposit, existing debts and the interest rate. Use the affordability calculator above for a personalized estimate.
How Much House Can I Afford?
How much house you can afford depends on your income, debts, deposit and rate. The home affordability calculator turns those into a price range.
Should I Choose a 15 or 30 Year Mortgage?
A 15-year loan costs less in total interest but has a higher monthly payment. A 30-year loan is easier month to month but costs more overall. The 15 vs 30 calculator compares them.
When Is Refinancing Worth It?
Refinancing is worth it when the interest saved outweighs the closing costs before you sell or move. The refinance calculator shows the break-even point.
What Is PMI and Can I Avoid It?
PMI is insurance lenders require when your deposit is below 20 percent. A larger down payment avoids it, and the PMI and down-payment calculators show the trade-off.
Do Extra Payments Really Help?
Yes. Because early payments are mostly interest, paying extra early cuts the principal and can save years and thousands. The payoff and biweekly tools quantify it.
Sources: Consumer Financial Protection Bureau on mortgages and closing costs, and Investopedia on mortgage rates.
Author
Shakeel Muzaffar is the Founder and Editor-in-Chief of MultiCalculators.com, bringing over 15 years of experience in digital publishing, product strategy, and online tool development. He leads the platform's editorial vision, ensuring every calculator meets strict standards for accuracy, usability, and real-world value. Shakeel personally oversees content quality, formula verification workflows, and the platform's commitment to publishing tools that are genuinely useful for students, professionals, and everyday users worldwide.
