Mortgage Calculator
Compare home prices, down payments, rates, and loan terms with a clear monthly cost breakdown.
Verify this calculatorVerified
See what the result uses—and what it cannot know.
Sumvoro calculates deterministically from the visible inputs. It does not invent lender terms, local rules, market values, medical facts, or professional judgments.
- 1 · InputsCheck every entered value against the latest statement, quote, measurement, or official source.
- 2 · Formula
Principal and interest use the fixed-rate amortization formula. Estimated monthly tax and insurance are added separately. - 3 · SensitivityUse Insights to run a lower and higher case. If the conclusion changes easily, collect better information or leave more margin.
- 4 · ScopeThis tool is maintained and covered by automated calculation tests. Provider timing, rounding, and omitted facts can still change a real-world result.
- Formula release
- 2026.10-r4
- Release date
- October 10, 2026
- Review status
- Verified
- Source review
- September 12, 2026
Mortgage Payment calculator
Principal and interest are only part of a housing payment. Ownership costs can materially change affordability.
- Use a current rate and term.
- Enter taxes and insurance separately.
- Budget for maintenance.
Optional readingLearn how this calculator works
How the mortgage calculator works
Estimate a monthly mortgage payment including principal, interest, property tax, and insurance.
Principal and interest use the fixed-rate amortization formula. Estimated monthly tax and insurance are added separately.
Read our calculation methodology and limitations.
Separate the loan payment from the cost of housing
Principal and interest are only part of the recurring obligation a homeowner needs to budget.
Build the full payment
Add property tax, homeowners insurance, mortgage insurance, HOA dues, and any known assessments before judging monthly affordability.
Compare rate and points together
A lower rate purchased with points can take years to recover. Compare upfront cash, expected ownership time, and interest saved over that same horizon.
Allow for changing costs
Fixed-rate principal and interest may stay level, but taxes, insurance, maintenance, and association charges can increase.
Example
A $400,000 home with 20% down creates a $320,000 principal balance before estimated taxes and insurance.
What affects the result
- The down payment changes the loan principal.
- Small rate differences can materially affect long-term interest.
- Taxes, insurance, HOA dues, and mortgage insurance may change the full housing cost.
Helpful guides
Frequently asked questions
Does this include PMI?
Yes. In Advanced, enter monthly mortgage insurance and how many months it applies. This is a user-entered assumption, not an automatic lender cancellation calculation.
Are property taxes exact?
No. They are an estimate based on the annual amount you enter.