Monthly Mortgage Payment Calculator

The figure quoted in an advertisement is principal and interest. The figure that leaves your account each month is that plus property tax, homeowner insurance, mortgage insurance where the loan requires it, and any association dues on the property. The gap between the two is routinely twenty to thirty percent of the payment.

This calculator builds the whole payment and keeps each component visible, because the components behave differently. Principal and interest are fixed for the life of a fixed-rate loan. Tax and insurance are not fixed at all - they are re-estimated every year and they only move in one direction most of the time. Mortgage insurance ends at a point you can calculate in advance.

Result

Total monthly payment

$3,170

Principal and interest: $2,389
Property tax: $433
Homeowner insurance: $158
Mortgage insurance: $189
Association dues: $0
Loan amount: $378,000
Loan-to-value: 90%
Total interest over the term: $482,118

Loan amount is 378000 after a down payment of 10% of the purchase price.

Private mortgage insurance is included because the loan starts above 80% loan-to-value. Most lenders remove it once the balance falls to 80%.

Yearly amortization summary

Year	Principal paid	Interest paid	Remaining balance
1	$4,225	$24,446	$373,775
2	$4,508	$24,163	$369,267
3	$4,810	$23,861	$364,457
4	$5,132	$23,539	$359,325
5	$5,476	$23,195	$353,849
6	$5,842	$22,828	$348,007
7	$6,234	$22,437	$341,773
8	$6,651	$22,019	$335,122
9	$7,097	$21,574	$328,026
10	$7,572	$21,099	$320,454

How to use the monthly mortgage payment calculator

Enter the purchase price and the down payment you plan to make.
Enter the rate and term you have been quoted.
Add the annual property tax, the annual homeowner insurance premium and any monthly association dues.
Read the total and check each component separately - the ones that change annually are the tax and insurance lines.

What people use this for

Working out what a specific listing would actually cost each month.
Checking a lender estimate line by line rather than accepting a single total.
Comparing a condominium against a house where association dues change the comparison.
Setting a household budget that includes the parts of the payment that rise annually.

Worked examples

Every figure below is produced by running this calculator against the example inputs, so the numbers always match the tool.

A purchase with ten percent down

$420,000 price, $42,000 down, 6.5% over 30 years, $5,200 annual tax, $1,900 insurance.

Total monthly payment: $3,170
Principal and interest: $2,389
Mortgage insurance: $189

A condominium with association dues

$310,000 price, $62,000 down, 6.25% over 30 years, $3,600 tax, $1,100 insurance, $340 monthly dues.

Total monthly payment: $2,259
Principal and interest: $1,527
Association dues: $340

Four components, four different behaviours

Principal and interest is the only fixed part. On a fixed-rate loan it will be the same in year twenty-nine as it was in month one, and inflation quietly reduces its weight over time.

Property tax follows assessments and local rates, and rises in most jurisdictions. Insurance follows the premium your carrier sets each renewal. Mortgage insurance ends when the loan reaches the equity threshold. Association dues follow whatever the association votes for.

Because three of the four move, the payment quoted at closing is a starting point rather than a permanent figure. Budgeting at exactly the closing payment leaves no room for the annual escrow adjustment.

Why the mortgage insurance line disappears

Private mortgage insurance protects the lender, not the borrower, and it applies while the loan is above eighty percent of value. Once the balance falls below that threshold it is removed - automatically on most conventional loans, and earlier on request if you can demonstrate the equity.

The calculator applies it only when the loan starts above eighty percent, which is why a twenty percent down payment removes the line entirely.

A payment you can afford is not the same as a payment a lender will approve

Lenders test the payment against a ratio. That test does not know about your commute, your childcare costs, or the maintenance a particular property will need. A house also generates expenses that never appear in a mortgage calculation at all.

The usual guidance is to treat the maximum as a ceiling rather than a target, and to leave the difference for the costs that arrive after the purchase.

Methodology and assumptions

What this calculator does, and what it deliberately does not do.

Principal and interest use the standard amortisation formula on the loan amount, rate and term.
Property tax and insurance are divided evenly across twelve months, which is how a servicer collects them into escrow.
Mortgage insurance is applied only when the loan starts above 80% of the purchase price, at the annual rate you enter, and is shown as a monthly figure.
Nothing here estimates a tax rate or an insurance premium for you - both are entered from your own quote or assessment.
Results are estimates. Real quotes depend on credit, income, property, loan programme and lender pricing at the time of application.
Nothing you type is transmitted or stored - the calculation runs entirely inside your browser.

This calculator is provided for informational and educational purposes only. Results are estimates and may not reflect actual rates, fees, taxes, or market conditions.

This website is not a lender, a mortgage broker or a financial adviser. It does not originate loans, does not accept applications and does not forward your details to anyone.

Actual loan terms depend on credit history, income, the property, the loan programme and lender pricing at the time of application. Only a lender can tell you what you qualify for.

Frequently asked questions

Why is my lender estimate higher than this?

Usually because it includes prepaid items and escrow funding at closing, or because the tax figure it uses is the reassessed amount after the sale rather than the current owner’s assessment.

Does the payment change over time?

The principal and interest portion does not on a fixed-rate loan. The escrow portion is recalculated annually, so the total normally changes at least once a year.

What if I do not escrow tax and insurance?

Some lenders allow it above a certain equity level. The bills still arrive - you pay them directly and set the money aside yourself. The annual cost is identical.

Is mortgage insurance ever permanent?

On some government-backed loan programmes it runs for the life of the loan regardless of equity. On conventional loans it is removable. Ask which applies to the specific programme you are offered.

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