Front-end DTI is the housing payment — principal, interest, taxes, insurance, and HOA when the property has dues — divided by gross monthly income. Back-end DTI is that housing payment plus the other debts the investor counts. A townhome or condo with a “cheap” note payment can still fail because HOA is housing, not a footnote. Snapshot as of 2026-08.
| Question | Front-end (housing) | Back-end (all counted debts) |
|---|---|---|
| What is in the ratio | Front-end DTI is housing payment (PITI plus HOA if applicable) divided by gross monthly income. | Back-end DTI is all counted monthly debts divided by gross monthly income. |
| Where HOA sits | HOA dues that are required for the subject property are housing expense. They sit in front-end DTI with principal, interest, taxes, and insurance — not in the “other debts” box of an affordability toy. | Back-end DTI still includes that housing payment plus counted installment, revolving, and other debts. A condo with a modest PITI and a large HOA can fail DTI even when the note payment looks comfortable. |
| What it is not | HOA is not mortgage insurance. PMI/MIP can change with LTV or program. HOA is set by the association and can rise after you close. | Student loans, auto loans, and revolving minimums are typically back-end lines, not HOA. Count them where the investor says. |
Affordability calculators that omit HOA will overstate a condo budget. Enter the association’s current dues, not a guess of zero.
Why condos surprise people
A special assessment or pending litigation at the project is a property-eligibility question as well as a payment question. It is not the same line as regular HOA dues. FHA condos also need project approval — FHA condo roster — which is not a DTI test but can kill the same contract.
Variable income is averaged before these ratios are run: When income is overtime, bonus, commission, or 1099, underwriters typically average a documented history (often 12–24 months) rather than using the highest recent month. Student loans have their own counting rules: IDR / SAVE and DTI.
How to use the calculator without lying to yourself
The affordability calculator is an illustration. Put HOA in the housing box. The payment calculator should include the same dues if you are comparing a condo to a single-family house. Neither tool is underwriting.
What happens next
- Ask the listing or HOA for the current monthly dues and whether a special assessment is pending.
- Re-run DTI with PITI + HOA as housing, plus car and student loans as counted debts.
- If the building is a condo and you hoped for FHA, look up the project before you write the offer. Then talk with a loan officer — that conversation is not a credit decision.
Common questions
Keep going
What to do next
Education first. A conversation with a loan officer is how you find out what may actually fit your file.
Loan information is provided by Ondo Real Estate (NMLS ID on file). This is not a commitment to lend, a loan approval, or an offer of credit. Rates, terms, and payments shown are estimates for illustration only, are not a quote, and are subject to credit approval, underwriting, and market conditions. You are not required to use Ondo for financing to buy or sell with Ondo. Equal Housing Lender. Program rules, fees, and county loan limits change. Confirm the current published schedule and lender overlays. Nothing here is a quote, a lock, or a credit decision. Licensing and disclosures