Five mortgage calculators compared on what they actually include — taxes, insurance and PMI — so the monthly payment you see is the one you will really pay.
Every mortgage calculator claims to show your monthly payment, but most quietly omit property taxes, home insurance and PMI — the three items that turn an estimate into a fantasy. A calculator that ignores them can be hundreds of dollars a month off.
Below are the five we tested, each with what it is genuinely best at. All are free; none requires an account.
Bankrate is the only one of the five that includes taxes, insurance and PMI without being asked, which is why its number is usually the highest and the closest to what you will actually pay. Use it as your baseline figure.
NerdWallet explains what each input means in plain English alongside the result. If you have never read an amortisation schedule or do not know what PMI is, start here — it teaches you the vocabulary while you calculate.
Zillow estimates payments using live listing data, so you can look at a house and see the monthly number immediately. It is the most convenient of the five and the least configurable.
Realtor.com works backwards from the monthly budget you can comfortably pay rather than forwards from a house price. That is the right direction if the real question is "how much house can I afford" rather than "what does this one cost".
Calculator.net shows a full year-by-year breakdown of interest versus principal and lets you model extra payments. It is the one to open when you want to see how much a slightly higher monthly payment actually saves over the life of the loan.
Every mortgage calculator claims to show your monthly payment, but most quietly omit taxes, insurance and PMI — the three items that turn an estimate into a fantasy. Always check what a calculator actually includes before trusting the number, and read the amortisation schedule rather than the headline figure.
Bankrate, because it includes property taxes, home insurance and PMI by default. Calculators that cover principal and interest only will understate your real payment, often by several hundred dollars a month.
Most do not, or they include them only if you enter them yourself. Always check whether the figure shown is principal and interest alone before you trust it.
Work backwards from a monthly payment you are comfortable with. Realtor.com's affordability calculator does exactly that, and Bankrate will show you what the taxes and insurance add on top.
Because they include different things. If one shows only principal and interest and another adds taxes, insurance and PMI, the second will be higher — and more realistic. Compare the inputs, not the outputs.