BrickAtlasCalculatorsMortgage
Mortgage payment calculator
Calculate the monthly principal and interest on a fully amortizing loan. This is the payment BrickAtlas subtracts inside rental cash flow and DSCR.
Calculate principal and interest
Enter the loan amount, annual interest rate, and term in years. The payment updates as you type. Taxes and insurance are not included.
Monthly principal and interest
$947
$138,750 at 7.25% for 30 years.
- Annual debt service
- $11,358
- Loan amount
- $138,750
Taxes, insurance, and HOA stay out of this payment.
How the mortgage payment is calculated
Payment = loan × r × (1 + r)^n ÷ ((1 + r)^n − 1)
r is the annual interest rate divided by 12. n is the term in years times 12. When the rate is 0, the payment is the loan divided by the number of months. The result is principal and interest only.
The sample loan is $138,750 at 7.25% for 30 years, which is $947 per month in principal and interest.
Taxes and insurance stay out
PITI adds taxes and insurance on top of this payment. Analyst keeps those in operating expenses, not inside the mortgage function.
The loan is price minus down payment
On a rental memo the loan amount is the purchase price minus the down payment, and it cannot go below zero. This page asks for that loan amount directly.
A refinance is a second payment
BRRRR replaces this purchase payment with a new loan sized off after-repair value. The purchase payment is only the carry until that refinance.
What this number doesn’t tell you
A mortgage payment is the cost of the loan, not the quality of the deal. Rent, expenses, and the city still decide whether the payment is covered. BrickAtlas runs that loop after the screen: persona, metros, listings, then a strategy-aware Investment Memo.
Whether rent covers it
DSCR divides NOI by this payment times 12. Cash flow subtracts the payment from effective income after expenses. The payment alone cannot say the rental works.
What you had to bring
A smaller loan is a larger down payment. Cash-on-cash feels that cash. The monthly payment does not.
Whether this market fits
An affordable payment in the wrong metro is still the wrong next investment. Explore ranks cities with Atlas Score and persona Match before you underwrite an address.
FAQ
- What does this mortgage calculator include?
- Principal and interest on a fully amortizing loan. It does not include property taxes, insurance, HOA, or mortgage insurance. Those are separate lines when Analyst builds cash flow.
- What happens if the interest rate is zero?
- The payment is the loan amount divided by the number of months in the term. There is no interest to amortize.
- Is this the same payment as BrickAtlas Analyst?
- Yes. Analyst uses this payment as monthly debt service on a purchase loan, and the same formula for a refinance payment when the strategy is BRRRR.
- How do I get from a price to a loan amount?
- Subtract the down payment from the purchase price. The rental cash flow and DSCR calculators do that for you. This page starts from the loan amount.
- Where should I go after a payment screen?
- Put the payment next to rent on the cash flow or DSCR calculator, or open Analyst on the address for the full memo. If you are still choosing a city, start in Explore.
Put the payment inside a deal
Set a persona, explore metros that match, and underwrite the address with the mortgage, cash flow, and DSCR together.
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