Quick guide
How to use this calculator
- Enter the contractual or scenario values requested by each label.
- Keep amounts in one currency and use the whole-period unit shown on each label.
- Review every result with the stated exclusions.
Calculation method
Calculation method
Total monthly housing payment = level mortgage payment + entered tax + insurance + other monthly charges.
The engine retains calculation precision and rejects invalid or numerically unreliable schedules.
Worked example
Scenario example
A 120,000 zero-rate mortgage over 120 months has a 1,000 principal-and-interest payment. Adding 100 tax, 50 insurance, and 25 other charges gives 1,175 per month.
Total monthly housing payment = level mortgage payment + entered tax + insurance + other monthly charges.
Supported inputs
Precision and limits
Visible limits
Amounts are capped at 1e12, entered rates at 1000%, periods at 1,200 months or 100 years, and fixed decimals at 12 places. A derived ARM rate above 1000% is rejected.
International scope
No jurisdiction, currency, tax, insurance, index path, lender rule, or legal interpretation is assumed.
Not a quotation
Results are mathematical scenarios based only on entered terms.
Specific assumptions
Every non-mortgage amount is user-entered; the calculator does not estimate local taxes, insurance, or association charges.