If you’ve ever been told “your DTI is too high,” you’re not alone. In 2026, the debt-to-income ratio (DTI) is still one of the fastest ways a lender (or automated underwriting system) decides whether a monthly payment looks safe for your budget. The good news is that DTI is also one of the most “fixable” parts of a mortgage application—if you know what counts, what doesn’t, and which steps move the needle before you apply.
This guide breaks DTI down in plain language: how it’s calculated, common limits we see across conventional lending, and practical strategies Minnesota buyers and homeowners can use to improve DTI—without guessing or relying on internet myths.
What is a debt-to-income ratio (DTI)?
DTI is a simple percentage: all your monthly debt payments divided by your gross monthly income. The Consumer Financial Protection Bureau explains it as monthly debt payments divided by gross monthly income (income before taxes and deductions).
That’s it. No secret formula. But the details—what counts as “debt,” what income is usable, and whether the lender looks at a “housing-only” ratio versus “total” ratio—are where most of the confusion comes from.
Front-end vs. back-end DTI: two numbers you may hear
Depending on the loan type, you may hear two DTI terms:
- Front-end (housing) ratio: your projected monthly housing payment divided by gross monthly income.
- Back-end (total) ratio: your projected monthly housing payment plus other monthly debts divided by gross monthly income.
Many conventional loans focus primarily on total DTI, especially when automated underwriting is used, but the “housing-only” number still matters because it reflects how tight your monthly budget could be after closing.
What counts in DTI (and what usually doesn’t)
A big reason DTI surprises people is that lenders don’t use your “real-life” budget. They use a standardized set of monthly obligations so different borrowers can be evaluated consistently.
Typically included in the debt side
- Projected housing payment: principal and interest, property taxes, homeowners insurance, and (if applicable) HOA dues. If you put less than 20% down on conventional, private mortgage insurance (PMI) is also commonly included.
- Installment loans: auto loans, student loans, personal loans.
- Minimum credit card payments (not the full balance, and not what you “usually” pay—lenders use the minimum required payment).
- Child support or alimony obligations (if documented and required to continue).
- Other recurring debts that show up on credit (or are otherwise documented), like certain installment plans.
Often not included in DTI (but still part of your real budget)
- Utilities, groceries, gas, childcare, phone bills, and subscriptions. (These still matter for you, but they typically aren’t part of the lender’s DTI formula.)
- Savings contributions or retirement investing (again: important, but not “debt” in the DTI sense).
How to calculate DTI (with a simple example)
The CFPB’s rule-of-thumb calculation is straightforward: add up monthly debt payments, divide by gross monthly income, and convert to a percentage.
Example: If your gross monthly income is $6,500 and your monthly debts are $2,600, your DTI is roughly 40% (2,600 ÷ 6,500 = 0.40).
Common DTI limits in 2026 (and why it depends)
DTI “limits” aren’t one number for everyone. They depend on the loan program, the lender’s rules (including overlays), and whether your file is approved by an automated underwriting engine or reviewed manually.
Conventional loans: a helpful benchmark from Fannie Mae
For conventional loans that follow Fannie Mae guidelines, their Selling Guide notes these maximum total DTI ratios: 36% for manually underwritten loans; up to 45% if certain credit score and reserve requirements are met; and 50% for loan casefiles underwritten through Desktop Underwriter (DU).
Translation: a borrower with a stronger overall profile can sometimes qualify with a higher DTI, while another borrower with the same DTI may not—because the AUS (and the lender) are evaluating the entire risk picture.
Why your lender’s limit can be lower than the “program” limit
Even if a program technically allows higher DTIs, lenders can set stricter internal rules (often called overlays). That’s why two borrowers can get different answers from two different lenders with the same income and debts.
Why DTI matters so much (beyond “approval”)
DTI isn’t just a checkbox. It can influence your interest rate, mortgage insurance cost, loan options, and how comfortable your payment feels once you add real-life expenses like utilities, commuting, and groceries.
In Minnesota, seasonal costs can also change the “feel” of a payment. Heating bills and winter driving can make a tight monthly budget feel even tighter, so we like to treat DTI as a starting point—not the finish line.
7 practical ways to improve your DTI before applying
Here are realistic, lender-friendly strategies we see work in the real world. You don’t have to do all of them—pick the ones that fit your timeline.
1) Pay down revolving balances to reduce minimum payments
Because DTI uses minimum monthly payments on credit cards, reducing a balance can lower the minimum payment and improve DTI. A common mistake is focusing on the balance alone instead of how the minimum payment is reported.
2) Avoid taking on new monthly obligations right before closing
A new car payment, a new credit card with a required minimum, or financing furniture can change your DTI quickly. If you’re close to qualifying, this is the easiest way to accidentally knock yourself out of approval.
3) Re-amortize or consolidate debt only if it truly lowers the payment
Sometimes a consolidation loan helps DTI—sometimes it hurts. The key question is: does the new required monthly payment go down after the refinance/consolidation, and will it be reported quickly enough before you apply? We can run both scenarios.
4) Consider paying off a small installment loan (but check timing)
Paying off an installment loan (like a small personal loan) can remove an entire monthly payment from DTI. But don’t do it blindly. If you pay it off the day before your credit is pulled, it may still appear until the creditor updates the bureau. Planning ahead matters.
5) Increase usable income (not just gross pay)
DTI improves when income goes up. But for mortgages, “usable” income depends on documentation and stability. Overtime, bonus, commission, and self-employment income may require a history to use. If you recently changed jobs or pay structure, ask early so we can document income correctly.
6) Adjust your target price, down payment, or interest-rate strategy
If DTI is the hurdle, changing the payment is often more effective than changing the paperwork. A slightly lower purchase price, a bit more down payment, choosing a different loan type, or locking at the right time can reduce the monthly payment that drives DTI.
7) Don’t guess—run a pre-approval scenario with a mortgage broker
DTI isn’t just math; it’s underwriting. The best approach is to run numbers the same way a lender will. At Davis Monroe Financial, we can compare options (loan programs, down payment strategies, and payment scenarios) and show you which change lowers DTI the most.
DTI red flags we see often (and how to avoid them)
A few common pitfalls can make DTI look worse than expected. Avoiding these can save a lot of time and frustration.
- Only counting your base salary when your pay includes commissions/bonus (or the opposite—assuming all extra income will count).
- Forgetting that taxes and insurance can raise the “true” housing payment (especially with escrow).
- Assuming a co-signer automatically “fixes” DTI. (Sometimes it helps, sometimes it creates additional complexity.)
- Trying to pay off debt by moving balances around instead of reducing the required monthly payments.
A quick DTI checklist you can use this weekend
If you want a fast, practical way to assess DTI before you talk to a lender, here’s a simple checklist:
- Write down your gross monthly income (before taxes).
- List required monthly payments: auto loans, student loans, minimum credit card payments, and other installment debts.
- Estimate your future housing payment (principal and interest + taxes + insurance + HOA + PMI if applicable).
- Add it all up and divide by gross monthly income to estimate total DTI.
If you’re near the edge, don’t panic. Small adjustments—like paying down a credit card balance enough to drop the minimum payment, or choosing a slightly different price range—can make the difference.
Talk with a Minnesota mortgage broker about your DTI
DTI is one of the clearest places where good advice saves time. If you want help running scenarios (and finding the most flexible option for your situation), Davis Monroe Financial is here to help.
Call (320) 200-2821 or visit www.mydmf.com to start a conversation. We’re based in Mora, Minnesota and work with buyers and homeowners across the state.