Loan budget calculator
Estimate a borrowing amount from the monthly repayment you can afford. Change the interest rate and term to see how they affect your loan budget.
How this calculation works
Start with take-home income, essential spending and savings. The percentage is your planning choice, not a bank eligibility rule. Existing debt payments are subtracted before calculating a hypothetical loan at a constant annual reducing-balance rate.
Work back from an affordable payment
This tool starts with a monthly payment budget and estimates the principal it could support at your chosen rate and term. It does not set a lender’s credit limit. Leave room in your budget for irregular expenses before treating the estimate as a borrowing target.
Review monthly spending · Compare quotations
Sources & assumptions
Formula-based scenario using your inputs. Example rates are not provider offers.
Sources reviewed 30 September 2026 · planning estimate
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