Loan Affordability Calculator
Estimate how much you may be able to borrow based on your income, expenses, interest rate, term, and preferred debt-to-income ratio.
Overview
This loan affordability calculator helps you estimate how much you may be able to borrow using your monthly income, existing debt payments, living expenses, interest rate, and loan term. It is a useful starting point for understanding what repayment level may fit your budget.
How it works
The calculator first estimates the maximum monthly debt load allowed by your chosen debt-to-income ratio. It then compares that amount with the income left after your living expenses and current debts. The lower of those two figures is used as the affordable monthly payment. Finally, it converts that payment into an estimated loan amount using a standard amortizing loan formula based on the interest rate and repayment term.
How to use this calculator
- 1Enter your regular monthly income.
- 2Add your current monthly debt payments.
- 3Include your monthly living expenses.
- 4Set your target debt-to-income ratio.
- 5Enter the expected annual interest rate and loan term.
- 6Review the estimated affordable loan amount and monthly payment.
Example Calculation
Monthly income
$5,000
Monthly debt payments
$500
Monthly living expenses
$1,800
Target debt-to-income ratio
36%
Annual interest rate
8%
Loan term
5
Estimated affordable loan amount
$64,114
With monthly income of $5,000, existing debt payments of $500, living expenses of $1,800, a 36% debt-to-income ratio, 8% interest, and a 5-year term, the estimated affordable loan amount is about $49,000, with monthly payments around $1,300.
Frequently asked questions
What does this calculator estimate?
It estimates a loan amount that may fit your budget based on your income, debts, expenses, interest rate, and term.
What is debt-to-income ratio?
Debt-to-income ratio is the percentage of your gross monthly income that goes toward debt payments. Lower ratios generally indicate more room in your budget.
Why does the calculator use both debt ratio and living expenses?
Using both helps show a more practical estimate by considering not just lender-style debt limits but also the money you need for everyday costs.
Does this guarantee a lender will approve me?
No. Lenders use their own checks, criteria, credit assessments, and affordability rules, so approval may differ from this estimate.
Should I enter gross or net income?
This version is designed for gross monthly income, which is your income before deductions, unless you prefer to use a more conservative figure consistently.
Are fees and insurance included?
No. The estimate does not include lender fees, optional insurance, taxes, or other borrowing costs unless you adjust your inputs to allow for them.
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Assumptions and warnings
Assumptions
- Results are estimates based on the income, expenses, debt payments, rate, and term you enter.
- The calculation assumes fixed monthly repayments for the full loan term.
- The interest rate is treated as constant and does not include future rate changes.
- Fees, charges, taxes, insurance, and lender-specific criteria are not included unless reflected in your inputs.
Warnings
- This calculator provides an estimate only and is not financial advice.
- Lenders may assess affordability differently and consider factors not included here.
- Speak to a qualified professional before making major borrowing decisions.