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What is the monthly payment for a $100,000 mortgage at 4% interest?

Based on a 20% down payment and a 30-year fixed-rate loan. Use the form below to adjust any assumption.

The purchase price of the home you're financing, before any down payment is subtracted.
$
The amount you pay upfront in cash. The rest of the home price becomes your loan amount.
$
The date your first mortgage payment is due. Used to project your payoff date.
How long you'll take to repay the loan. Common terms are 15 or 30 years. Longer terms lower your monthly payment but increase total interest paid.
yrs mo
The annual interest rate charged on the loan by your lender, before taxes, insurance, or HOA fees.
%
Optional Annual Expenses (property tax, insurance, PMI, HOA)
Billed by your local government. U.S. homeowners pay around 1.1% of property value per year on average.
$
/year
Protects against damage to the property. Cost varies by location, property condition, and coverage amount.
$
/year
Private Mortgage Insurance required when your down payment is below 20%. Typically costs 0.3%–1.9% of the loan amount per year.
$
/year
Paid to a homeowners association — common for condos, townhomes, and some single-family developments.
$
/year

Monthly Pay

$381.93

Example

On a $100,000.00 home with a $20,000.00 (20%) down payment, a 30 years term, and a 4% interest rate, the loan amount is $80,000.00. The monthly principal and interest payment comes out to $381.93, with around $57,495.61 in total interest paid over the life of the loan.

Loan Amount

$80,000.00

Total Interest

$57,495.61

Total Cost of Loan

$137,495.61

Loan summary

Home Price

$100,000.00

Down Payment

$20,000.00

Loan Term

30 yrs

Interest Rate

4%

Monthly P&I

$381.93

Total of Payments

$137,495.61

Total Interest

$57,495.61

Payoff Date

Jul 2056

Total cost of loan, split between principal and interest

  • Principal (loan amount): $80,000.00
  • Total interest: $57,495.61

Amortization schedule

Amortization Schedule
Monthly P&I: $381.93
Year Date Principal Paid Interest Paid Ending Balance
1 Jul 2027 $1,408.83 $3,174.36 $78,591.17
2 Jul 2028 $1,466.23 $3,116.96 $77,124.94
3 Jul 2029 $1,525.96 $3,057.22 $75,598.98
4 Jul 2030 $1,588.13 $2,995.05 $74,010.85
5 Jul 2031 $1,652.84 $2,930.35 $72,358.01
6 Jul 2032 $1,720.18 $2,863.01 $70,637.83
7 Jul 2033 $1,790.26 $2,792.93 $68,847.58
8 Jul 2034 $1,863.20 $2,719.99 $66,984.38
9 Jul 2035 $1,939.11 $2,644.08 $65,045.28
10 Jul 2036 $2,018.11 $2,565.08 $63,027.17
11 Jul 2037 $2,100.33 $2,482.86 $60,926.84
12 Jul 2038 $2,185.90 $2,397.29 $58,740.94
13 Jul 2039 $2,274.96 $2,308.23 $56,465.98
14 Jul 2040 $2,367.64 $2,215.55 $54,098.34
15 Jul 2041 $2,464.10 $2,119.08 $51,634.24
16 Jul 2042 $2,564.49 $2,018.69 $49,069.75
17 Jul 2043 $2,668.98 $1,914.21 $46,400.77
18 Jul 2044 $2,777.71 $1,805.47 $43,623.06
19 Jul 2045 $2,890.88 $1,692.30 $40,732.17
20 Jul 2046 $3,008.66 $1,574.53 $37,723.51
21 Jul 2047 $3,131.24 $1,451.95 $34,592.28
22 Jul 2048 $3,258.81 $1,324.38 $31,333.47
23 Jul 2049 $3,391.58 $1,191.61 $27,941.89
24 Jul 2050 $3,529.76 $1,053.43 $24,412.13
25 Jul 2051 $3,673.56 $909.62 $20,738.56
26 Jul 2052 $3,823.23 $759.96 $16,915.33
27 Jul 2053 $3,979.00 $604.19 $12,936.34
28 Jul 2054 $4,141.11 $442.08 $8,795.23
29 Jul 2055 $4,309.82 $273.37 $4,485.41
30 Jul 2056 $4,485.41 $97.78 $0.00

About These Parameters

Home Price
The purchase price of the home you're financing, before any down payment is subtracted.
Down Payment
The amount you pay upfront in cash. The rest of the home price becomes your loan amount.
Start Date
The date your first mortgage payment is due. Used to project your payoff date.
Loan Term
How long you'll take to repay the loan in years — commonly 15 or 30. Longer terms lower the monthly payment but increase total interest.
Interest Rate
The annual interest rate charged on the loan by your lender, before taxes, insurance, or HOA fees.
Property Tax
Billed by your local government. U.S. homeowners pay around 1.1% of property value per year on average.
Home Insurance
Protects against damage to the property. Cost varies by location, property condition, and coverage amount.
PMI
Private Mortgage Insurance required when your down payment is below 20%. Typically costs 0.3%–1.9% of the loan amount per year.
HOA Fees
Annual fees paid to a homeowners association — common for condos, townhomes, and some single-family developments. Divided by 12 internally to get the monthly cost.

How Mortgage Payments Work

The Formula

The standard fixed-rate mortgage payment formula is:

M = P × r(1 + r)ⁿ / [(1 + r)ⁿ − 1]

M = monthly principal & interest payment
P = loan amount (home price − down payment)
r = monthly interest rate (annual rate ÷ 12)
n = total number of payments (years × 12)

Amortization: Why Early Payments Are Mostly Interest

Every payment covers the month's accrued interest first; whatever remains reduces the principal balance. Because the balance is highest at the start, the interest portion is also highest — on a 30-year mortgage you can pay more in interest than in principal for the first 18 years. The split gradually inverts as the balance falls.

Down Payment and PMI

A larger down payment shrinks the loan amount, directly lowering both your monthly payment and total interest. Putting down at least 20% also eliminates Private Mortgage Insurance (PMI) — typically 0.3%–1.9% of the loan amount per year, cancelled once your loan-to-value ratio reaches 80%.

15-Year vs. 30-Year Mortgage

A 30-year term cuts the monthly payment roughly in half compared with a 15-year term, but total interest paid is typically 2–3× higher. A 15-year mortgage builds equity faster and often carries a lower rate, but the higher payment limits cash-flow flexibility.

Additional Example

Think of a 30-year mortgage like a slowly emptying tank: you pay the same amount every month, but for years you're mostly covering the "cost of renting" the bank's money (interest), with only a trickle going toward ownership (principal). As the balance falls, that trickle grows into a flood — and in the final years, nearly all of each payment is pure equity.

Frequently Asked Questions

What is included in a monthly mortgage payment?

The base payment covers principal and interest. Lenders often collect property tax and homeowners insurance into an escrow account. If your down payment was less than 20%, PMI is added. HOA fees are a separate charge.

How does a fixed-rate mortgage differ from an ARM?

A fixed-rate mortgage keeps the same interest rate for the entire term. An adjustable-rate mortgage (ARM) starts with a fixed rate for an introductory period, then resets periodically based on a market index. ARMs carry lower initial rates but introduce payment uncertainty after the fixed period ends.

Can I pay off a mortgage early?

Yes. Making extra payments toward the principal reduces the balance and therefore total interest paid. Even one extra payment per year on a 30-year mortgage can cut roughly 4–5 years off the payoff date. Check your loan agreement for prepayment penalties.

$100,000 home at other rates

$100,000 home at 4.5% interest $100,000 home at 5% interest $100,000 home at 5.5% interest $100,000 home at 6% interest $100,000 home at 6.5% interest $100,000 home at 7% interest $100,000 home at 7.5% interest $100,000 home at 8% interest

Other prices at 4%

$150,000 home at 4% interest $200,000 home at 4% interest $250,000 home at 4% interest $300,000 home at 4% interest $400,000 home at 4% interest $500,000 home at 4% interest $750,000 home at 4% interest $1,000,000 home at 4% interest

See also