Estimate the principal supported by a chosen monthly payment, interest rate and loan term. This answers a mathematical question, not whether a lender will approve the loan.
Principal = payment × (1 − (1+i)^−n) / i. At zero interest, principal = payment × n.
A payment budget of 500 per month for 10 years supports 60,000 at zero interest. At a positive interest rate it supports less because part of each payment covers interest.
Enter only the payment budget available for principal and interest. Taxes, insurance, fees and other debts reduce what you can afford. Income checks, deposit requirements and lender stress tests are outside the calculation.
References support the identified formula, unit or jurisdiction. They do not imply endorsement of this site. Check the original document for current conditions and exceptions.
Editorial responsibility: Nicolas Belotti · Methods and testing · Report an error
English edition: 16 September 2026.