Useful next calculations
When to use this calculator
- Before comparing personal loan or credit offers on the same amount and term.
- When you want to see total interest, not only the monthly payment.
- When you are choosing between a shorter term and a lower monthly debit.
- When you need a planning estimate before making a credit application.
A worked example
These are the example figures the calculator opens with.
| Input | Value |
|---|---|
| Gross Monthly Income ($) | $6,000 |
| Mortgage / Rent Payment ($) | $0 |
| Car Loan Payments ($) | $0 |
| Student Loan Payments ($) | $0 |
For those figures the calculator returns:
- Front-end DTI: 0.00%
- Back-end DTI: 0.00%
- Max mortgage (conv.): $1,680.00
- Max total debt: $2,160.00
- Remaining capacity: $2,160.00
Method & assumptions
This calculator computes your front-end and back-end debt-to-income ratios using gross monthly income as the denominator, consistent with how Fannie Mae, Freddie Mac, FHA, and VA underwriting guidelines define DTI. The front-end ratio isolates housing costs only; the back-end ratio adds all recurring monthly debt obligations. The conventional maximum benchmarks used here are 28% front-end and 36% back-end, the traditional Fannie Mae/Freddie Mac standard. FHA generally permits a 31/43 split, while VA and USDA use a single 41% back-end guideline. Automated underwriting systems can approve loans above these thresholds with compensating factors, so these figures should be treated as general guidance rather than definitive approval thresholds.
The calculator does not include property taxes, homeowners insurance, or HOA fees in the proposed mortgage payment — you should add those estimates to your housing figure for a more accurate front-end DTI. It also assumes all income is fully documented and does not adjust for self-employment, commission, or variable-income verification requirements that apply under agency guidelines. Verify current DTI limits directly with your lender or loan officer, as guidelines change and vary by loan program and underwriting method.
Common mistakes
- Using an assumption that is not supported by a current local quote, bill, statement or official source.
- Treating a generic estimate as a lender, provider, payroll or tax authority decision.
- Mixing monthly and annual inputs without converting them consistently.
- Testing only one scenario instead of checking how a cautious assumption changes the result.
What to do next
- Run a second scenario with a cautious assumption so you can see the downside clearly.
- Compare the result with the related calculators below before making a decision.
- Check current local rules, eligibility and provider terms before applying or committing money.
- Keep a record of the assumptions so you can update the estimate when a quote, bill or pay figure changes.