Mortgage PWA

Interest-Only Mortgage Calculator

United States

Interest-Only Mortgage Calculator

United States

Mobile-first mortgage calculator with escrow, PMI, extra payments, amortization, charts, and PWA support.

Monthly payment

$3,532

Biweekly

$2,505

Monthly payment

$3,532

Biweekly

$2,505

Estimated monthly payment

$3,532

Includes principal, interest, taxes, insurance, PMI, HOA, and other costs.

Loan amount: $400,000

Payoff date

Feb 2056

Assumes steady rate and current extra payments.

Biweekly estimate

$2,505

Same payoff as monthly schedule.

Total interest

$577,455

Biweekly savings: $444

Payment breakdown

$3,532

76.88% to principal & interest

Principal & interest$2,715

Property tax$500

Home insurance$150

PMI / LMI$167

HOA / Strata$0

Other costs$0

Interest-Only Mortgage Calculator guide

The interest-only mortgage calculator helps you estimate payments for loans with an interest-only period. During that period, you pay only interest (plus escrow); principal does not decrease. This calculator uses standard amortization—for a true interest-only comparison, the principal portion would be zero during the IO period. We prefill $500,000, 20% down, 7.2% rate to reflect typical IO pricing.

Use the calculator to see how rate and loan amount affect the interest portion of your payment. Property tax, insurance, and HOA are included. When the IO period ends, payments typically recast to include principal—consult your lender for exact terms. All math runs client-side. Install the PWA for offline use.

Amortization schedule

Yearly view

Period	Date	Principal	Interest	Escrow	PMI	Total interest	Ending balance
2026	Jan 2026	$3,238	$23,914	$6,500	$0	$23,914	$396,762
2027	Jan 2027	$4,150	$28,432	$7,800	$0	$52,345	$392,612
2028	Jan 2028	$4,459	$28,123	$7,800	$0	$80,468	$388,153
2029	Jan 2029	$4,791	$27,791	$7,800	$0	$108,259	$383,362
2030	Jan 2030	$5,147	$27,434	$7,800	$0	$135,693	$378,215
2031	Jan 2031	$5,531	$27,051	$7,800	$0	$162,745	$372,684
2032	Jan 2032	$5,942	$26,640	$7,800	$0	$189,384	$366,742
2033	Jan 2033	$6,384	$26,197	$7,800	$0	$215,582	$360,357
2034	Jan 2034	$6,860	$25,722	$7,800	$0	$241,304	$353,498
2035	Jan 2035	$7,370	$25,212	$7,800	$0	$266,516	$346,128
2036	Jan 2036	$7,919	$24,663	$7,800	$0	$291,179	$338,209
2037	Jan 2037	$8,508	$24,074	$7,800	$0	$315,253	$329,701
2038	Jan 2038	$9,141	$23,441	$7,800	$0	$338,694	$320,560
2039	Jan 2039	$9,821	$22,760	$7,800	$0	$361,454	$310,739
2040	Jan 2040	$10,552	$22,029	$7,800	$0	$383,484	$300,187
2041	Jan 2041	$11,338	$21,244	$7,800	$0	$404,728	$288,849
2042	Jan 2042	$12,181	$20,400	$7,800	$0	$425,128	$276,667
2043	Jan 2043	$13,088	$19,494	$7,800	$0	$444,622	$263,579
2044	Jan 2044	$14,062	$18,520	$7,800	$0	$463,142	$249,517
2045	Jan 2045	$15,109	$17,473	$7,800	$0	$480,615	$234,409
2046	Jan 2046	$16,233	$16,349	$7,800	$0	$496,964	$218,175
2047	Jan 2047	$17,441	$15,141	$7,800	$0	$512,104	$200,734
2048	Jan 2048	$18,739	$13,842	$7,800	$0	$525,947	$181,995
2049	Jan 2049	$20,134	$12,448	$7,800	$0	$538,394	$161,861
2050	Jan 2050	$21,632	$10,949	$7,800	$0	$549,344	$140,228
2051	Jan 2051	$23,242	$9,339	$7,800	$0	$558,683	$116,986
2052	Jan 2052	$24,972	$7,610	$7,800	$0	$566,293	$92,013
2053	Jan 2053	$26,831	$5,751	$7,800	$0	$572,044	$65,183
2054	Jan 2054	$28,828	$3,754	$7,800	$0	$575,798	$36,355
2055	Jan 2055	$30,973	$1,609	$7,800	$0	$577,407	$5,382
2056	Jan 2056	$5,382	$48	$1,300	$0	$577,455	$0

Figures include principal, interest, escrow amounts, and PMI where applicable. Minor rounding may occur.

FAQs

Interest-Only Mortgage Calculator — frequently asked questions

Straight answers about taxes, PMI, extra payments, and biweekly schedules.

What is an interest-only mortgage?+

During the interest-only period, you pay only interest (and escrow). Principal does not decrease. After the IO period, payments typically increase to include principal amortization.

Who uses interest-only loans?+

Investors and high-income borrowers sometimes use IO loans for cash flow flexibility. They require discipline to pay down principal before the recast.

Does this calculator show the IO period?+

The calculator uses standard amortization. For a pure IO view, the principal payment would be zero during the IO period. Use the breakdown to see the interest portion.

What happens when the IO period ends?+

Payments typically recast to fully amortize the remaining balance over the remaining term. Your payment will increase significantly.

Are interest-only loans still available?+

IO products are less common after the financial crisis but still exist for qualified borrowers. Check with lenders for current availability.

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