Home price ($)Down payment ($)Annual interest rate (%)Loan term (years)Annual property tax ($)Annual homeowners insurance ($)Monthly HOA dues ($)

Mortgage insurance, closing costs, maintenance and changing escrow amounts are not included unless entered separately.

Use the complete monthly cost

Principal and interest are only part of homeownership. Review taxes, insurance, association dues, mortgage insurance, utilities and maintenance before deciding what is comfortable.

Compare realistic scenarios

Test both the current rate and a slightly higher rate
Compare 15-, 20- and 30-year terms
Keep emergency savings after the down payment and closing
Confirm estimates with a lender and current property records

Educational estimate only; not a lender quote, approval or financial advice.

Written and maintained by Ryan V. Rhodes — Founder & Editor, IQlatorEducational information

Read a mortgage payment as one part of homeownership cost

A mortgage payment estimate usually begins with principal and interest, but the amount leaving a household account may also include property tax, homeowners insurance, mortgage insurance and association dues. Comparing only principal and interest can understate the monthly commitment.

How to use this page

The calculator subtracts the down payment from the home price and applies the fixed-rate amortization formula over the selected term. Interest is calculated from the outstanding principal, so early scheduled payments contain more interest than later payments.

Practical exampleCompare 15-year and 30-year terms using the same loan amount and rate. The shorter term generally has a larger payment but less total interest; the longer term offers a smaller required payment at a greater lifetime borrowing cost.

Inputs to verify

Enter the actual loan amount rather than the purchase price.
Add realistic local tax, insurance and association estimates to the budget.
Compare lender APR, points, fees and cash to close—not only the note rate.

Common questions

Why is my lender quote higher?

The lender may include escrow, mortgage insurance, fees or a different rate and loan amount.

Does the estimate include adjustable rates?

The standard result assumes a fixed rate unless the page specifically models future rate changes.

Methodology and sources: See IQlator calculation methodology and source standards. Uses standard fixed-rate amortization. Verify official Loan Estimate figures before deciding.

Amortization schedule and extra-payment scenario

See how each payment is divided between interest and principal. Add an optional recurring amount to principal to estimate how the payoff date and lifetime interest could change.

Extra principal each month ($)

Payment	Payment*	Interest	Principal	Balance
1	$2,023	$1,733	$289	$319,711
2	$2,023	$1,732	$291	$319,420
3	$2,023	$1,730	$292	$319,127
4	$2,023	$1,729	$294	$318,833
5	$2,023	$1,727	$296	$318,538
6	$2,023	$1,725	$297	$318,241
7	$2,023	$1,724	$299	$317,942
8	$2,023	$1,722	$300	$317,641
9	$2,023	$1,721	$302	$317,339
10	$2,023	$1,719	$304	$317,036
11	$2,023	$1,717	$305	$316,730
12	$2,023	$1,716	$307	$316,423
13	$2,023	$1,714	$309	$316,115
14	$2,023	$1,712	$310	$315,804
15	$2,023	$1,711	$312	$315,492
16	$2,023	$1,709	$314	$315,179
17	$2,023	$1,707	$315	$314,863
18	$2,023	$1,706	$317	$314,546
19	$2,023	$1,704	$319	$314,227
20	$2,023	$1,702	$321	$313,907
21	$2,023	$1,700	$322	$313,584
22	$2,023	$1,699	$324	$313,260
23	$2,023	$1,697	$326	$312,935
24	$2,023	$1,695	$328	$312,607
25	$2,023	$1,693	$329	$312,278
26	$2,023	$1,692	$331	$311,947
27	$2,023	$1,690	$333	$311,614
28	$2,023	$1,688	$335	$311,279
29	$2,023	$1,686	$337	$310,942
30	$2,023	$1,684	$338	$310,604
31	$2,023	$1,682	$340	$310,264
32	$2,023	$1,681	$342	$309,922
33	$2,023	$1,679	$344	$309,578
34	$2,023	$1,677	$346	$309,232
35	$2,023	$1,675	$348	$308,885
36	$2,023	$1,673	$349	$308,535
37	$2,023	$1,671	$351	$308,184
38	$2,023	$1,669	$353	$307,830
39	$2,023	$1,667	$355	$307,475
40	$2,023	$1,665	$357	$307,118
41	$2,023	$1,664	$359	$306,759
42	$2,023	$1,662	$361	$306,398
43	$2,023	$1,660	$363	$306,035
44	$2,023	$1,658	$365	$305,670
45	$2,023	$1,656	$367	$305,303
46	$2,023	$1,654	$369	$304,934
47	$2,023	$1,652	$371	$304,564
48	$2,023	$1,650	$373	$304,191
49	$2,023	$1,648	$375	$303,816
50	$2,023	$1,646	$377	$303,439
51	$2,023	$1,644	$379	$303,060
52	$2,023	$1,642	$381	$302,679
53	$2,023	$1,640	$383	$302,296
54	$2,023	$1,637	$385	$301,910
55	$2,023	$1,635	$387	$301,523
56	$2,023	$1,633	$389	$301,134
57	$2,023	$1,631	$391	$300,742
58	$2,023	$1,629	$394	$300,349
59	$2,023	$1,627	$396	$299,953
60	$2,023	$1,625	$398	$299,555

*Principal-and-interest payment plus the optional extra principal. Taxes, insurance, HOA and mortgage insurance are not part of this amortization table.

Worked mortgage example: what the monthly payment really contains

Consider the prefilled example: a $400,000 home with an $80,000 down payment leaves a $320,000 mortgage. At 6.5% for 30 years, the scheduled principal-and-interest payment is about $2,023 per month. Adding $6,000 per year of property tax and $1,800 per year of homeowners insurance adds about $650 per month, producing an estimated housing payment near $2,673 before HOA dues, mortgage insurance, maintenance and utilities.

This distinction matters because a lender's principal-and-interest figure is not necessarily the amount a household must budget each month. The CFPB explains that a total mortgage payment commonly includes property taxes, homeowners insurance and, when applicable, mortgage insurance. Actual escrow amounts can also change over time.

How amortization changes over the life of the loan

A fixed-rate mortgage normally keeps the required principal-and-interest payment level, but the composition of that payment changes. Early in the loan, the outstanding balance is high, so more of each payment goes to interest. As principal falls, monthly interest falls too and more of the same payment reduces principal. The schedule above makes that progression visible instead of showing only one monthly-payment number.

Extra principal can change the schedule because interest is calculated from the remaining balance. An additional principal payment reduces that balance sooner, which can reduce later interest and shorten the payoff period. Use the extra-payment field to compare scenarios, but confirm with your servicer how extra funds must be designated and whether your loan has unusual terms.

How to compare mortgage scenarios

Start with a realistic purchase price and down payment, then test more than one interest rate and loan term. A shorter term generally requires a larger monthly payment but can reduce lifetime interest. A larger down payment reduces the amount financed, although using all available cash for a down payment can leave too little for closing costs, repairs and emergencies.

Do not use a low estimate for taxes or insurance merely to make a home appear affordable. Those costs are determined separately from the mortgage rate and can materially change the monthly budget. If the down payment is below 20%, mortgage insurance may also apply depending on the loan program and lender.

Common mortgage-calculator mistakes

Comparing only principal and interest: budget taxes, insurance, mortgage insurance and HOA costs too.
Using the purchase price as the loan amount: financing generally starts after subtracting the down payment.
Treating an advertised rate as a personal quote: your actual rate and APR depend on the loan and borrower circumstances.
Ignoring closing cash: monthly affordability and cash needed at closing are different questions.
Assuming taxes and insurance never change: escrow-related costs can change even on a fixed-rate mortgage.

Mortgage calculator FAQ

What is included in IQlator's monthly housing estimate?

The main estimate combines scheduled principal and interest with the property tax, homeowners insurance and HOA amounts you enter. Mortgage insurance and other costs should be considered separately unless specifically entered or modeled.

What does the amortization table show?

It shows the estimated interest, principal and remaining loan balance for each payment under the entered fixed-rate assumptions.

Does paying extra principal always save interest?

For a standard amortizing loan, reducing principal earlier generally reduces future interest and can shorten payoff time. Loan terms and servicing rules vary, so verify how your lender applies extra payments.

Is this the same as a lender's Loan Estimate?

No. IQlator is an educational planning tool. A lender's official Loan Estimate contains loan-specific rate, payment, closing-cost and other disclosures.

About the author

Ryan V. Rhodes is the public pen name of IQlator's founder and editor. He oversees calculator design, methodology, worked examples and educational explanations. IQlator does not represent him as a CPA, CFA, CFP, attorney, tax professional or investment adviser.

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