Debt-to-Income Ratio for a Personal Loan

How can the same 36% DTI produce very different budgets?

These invented households both have $5,000 gross monthly income, $3,500 take-home income and $1,500 existing monthly debt payments. The housing debt payment, if any, is already in that $1,500; it is not counted again under essentials. Each considers a $300 new loan payment. Essentials below exclude payments already in the debt column and include each household’s own remaining living costs.

A negative result is a funding gap, even though the DTI matches. A positive result is not an approval or a recommendation to use all remaining cash for borrowing. Include realistic irregular bills and savings needs in your own budget.

What happens in a lower-income month?

If Household A’s gross income falls to $4,000 and take-home falls to $2,800 while debts, proposed payment and essentials stay the same, DTI becomes 1800/4000=45%. Cash after essentials becomes 2800−1500−300−1100=−100 before the buffer. The take-home change is an independent model input, not an assumed tax conversion. Test your own low-income month, not just an average.

Which figure belongs in each calculation?

The CFPB defines DTI using monthly debt payments divided by gross monthly income. For cash flow, use take-home income and all outgoings, counting each once. Ask the lender which obligations and documented income it includes; this worksheet does not impose an underwriting cutoff. Version 1.0, October 29,2026. The table uses simple sums and subtraction with invented constant monthly inputs; it does not estimate taxes, benefits, approval odds or an offered loan amount.

Use DTI=100*(existing debt+new payment)/gross income; cash margin=take-home−existing debt−new payment−other essentials−chosen buffer. If a bill is already included in debt payments, do not subtract it again as an essential cost.