Max Loan Amount Calculator
The Max Loan Amount Calculator works backward from your monthly budget to find the largest loan principal you can borrow at a given rate and term. Ideal for setting a borrowing ceiling before shopping.
What this means
Lenders qualify you on payment, so knowing your budget first keeps you within comfortable limits. This calculator inverts the payment formula to tell you the principal your budget supports.
How we calculate it
Formula
Principal = PMT × (1 − (1 + r)^−n) / r — where PMT is your monthly budget, r the monthly rate and n the months.Worked example
A $500 monthly budget at 5% over 60 months:
- 1Monthly rate = 5% / 12 = 0.4167%
- 2Max principal ≈ $26,495
Important assumptions
- Payments are equal and the rate is fixed.
- Fees and taxes are excluded.
Frequently asked questions
Should I borrow the maximum?
Just because you can qualify for a larger loan doesn't mean you should. Borrow less than your maximum to leave room for unexpected expenses.
How does term change what I can borrow?
Longer terms lower the payment per dollar borrowed, so they support a larger principal — but at higher total interest.