Can You Buy a Duplex With an FHA Loan? Down Payment and Limits

Yes, buying a duplex with an FHA loan is allowed, and it’s one of the more useful moves available to a first-time buyer. You can finance a two-unit property with as little as 3.5% down, live in one unit, and rent out the other. The trade-off is the occupancy rule: FHA insures loans for owner-occupants, not absentee investors, so you have to move in.

Credit Score and Down Payment

Your credit score sets the down payment. A score of 580 or higher qualifies you for FHA’s maximum financing, meaning 3.5% down on the lower of the purchase price or appraised value.¹ On a $400,000 duplex, that’s $14,000 rather than the $80,000 a conventional 20% down payment would require.

Scores between 500 and 579 still qualify, but FHA caps the loan-to-value ratio at 90%, so you’ll need 10% down.¹ Below 500, FHA won’t insure the loan. If you’re paying more than the appraised value, the difference comes out of pocket.

2026 FHA Loan Limits for a Duplex

FHA sets separate, higher limits for two-unit properties than for single-family homes. For 2026, the national floor for a duplex is $693,050, and the ceiling in high-cost areas reaches $1,599,375.² Your specific cap depends on the county, since limits track local median home prices.

Look up the exact figure for any county using HUD’s mortgage limits tool, which searches by state, county, or metropolitan area.³ Do this early. There’s no point falling for a property that exceeds your area’s cap.

The Owner-Occupancy Rule

You must move into one of the duplex’s units within 60 days of closing and live there as your primary residence for at least one year.⁴ Occupancy fraud is a federal offense, and lenders verify it.

After the first year, you have options. You can move out and rent both units while keeping the FHA loan in place. Many duplex buyers treat that first year as a launching pad: live on one side, collect rent on the other, build equity, then move on. If you later want to drop FHA mortgage insurance or allow short-term rentals, refinancing into a conventional loan is the usual path.

Using Rental Income to Qualify

This is where a duplex beats a single-family purchase under FHA rules. Lenders can count 75% of the projected rental income from the second unit as part of your qualifying income.⁴ The 25% discount accounts for vacancy and maintenance. If the appraiser estimates the second unit rents for $1,600 a month, the lender adds $1,200 to your monthly income.

That income runs against your debt-to-income ratio, which FHA generally caps at 43%. Borrowers with strong credit, significant savings, or other compensating factors can sometimes qualify with a ratio as high as 50%. The rental boost often turns a marginal application into a comfortable one.

If the second unit already has a tenant, provide the current lease to document the rent. If it’s vacant, the appraiser estimates fair market rent and the lender uses that figure. Either way, only 75% counts.

No Self-Sufficiency Test

FHA imposes a self-sufficiency test on three- and four-unit properties, requiring rental income alone to cover the full mortgage payment. Duplexes are exempt. The second unit’s rent doesn’t have to cover the whole payment; it just has to help enough to meet the debt-to-income threshold.

Cash Reserves

Three- and four-unit FHA purchases require three months of mortgage payments in reserve after closing. Two-unit properties do not.⁴ Even so, a cushion is smart. Vacancies and repairs tend to show up in year one.

Mortgage Insurance

FHA loans carry two mortgage insurance charges, and together they’re the cost most buyers underestimate.

The Upfront Mortgage Insurance Premium is 1.75% of the base loan amount, due at closing.⁵ On a $400,000 loan, that’s $7,000. Most borrowers roll it into the balance rather than paying cash, which raises the monthly payment and total interest.

The Annual Mortgage Insurance Premium is collected monthly and varies by loan term, amount, and loan-to-value ratio. A typical 30-year duplex loan with 3.5% down carries an annual rate between 0.55% and 0.75% of the balance. On a $400,000 loan, that’s roughly $180 to $250 a month.⁵

The part that surprises people: on FHA loans with less than 10% down, which includes anyone using the 3.5% minimum, the annual MIP stays for the entire life of the loan. It never drops off. With 10% or more down, MIP expires after 11 years. The only way to eliminate it sooner is to refinance into a conventional mortgage once you’ve built enough equity, typically 20%.

Appraisal and Property Standards

FHA duplex appraisals use the Small Residential Income Property Appraisal Report (Form 1025), which evaluates market value and fair market rent for each unit.⁶ The appraiser is looking at the property as both a home and an income asset.

The appraiser also confirms the duplex meets FHA’s Minimum Property Standards. Both units must be fully self-contained with their own kitchen, bathroom, and entrance. The property needs adequate heating, safe electrical, potable water, and sound structural conditions.⁴ Peeling lead-based paint, broken heating, or structural damage must be fixed before closing. Sellers typically handle these repairs, but the negotiation can slow things down. Budget extra time for older buildings.

FHA 203(k) for Duplexes That Need Work

If a duplex is priced well but needs repairs, FHA’s 203(k) program rolls the purchase and the renovation into a single mortgage. That matters for duplex buyers because older multi-unit properties often fail Minimum Property Standards on the first pass.

The program has two tiers:⁷

Limited 203(k) covers up to $75,000 in repairs and improvements, with no minimum. It suits cosmetic work, appliance replacement, flooring, and minor structural fixes.
Standard 203(k) is required when repairs exceed $75,000 or involve major structural work. Rehabilitation must cost at least $5,000, and the total property value after repairs must stay within your area’s FHA loan limit.

The Standard 203(k) requires a HUD consultant to oversee the project, which adds cost but provides some protection against contractor problems.

Documents to Gather Before Applying

FHA underwriting is thorough. Having your paperwork ready saves weeks:

Two years of federal tax returns, two years of W-2s, and pay stubs covering the most recent 30 days.
Bank statements from the past 60 days showing the source of your down payment and closing funds.
The current lease for the second unit if it’s tenant-occupied.
A signed gift letter if a family member is contributing to the down payment, stating the amount, the donor’s relationship, and that no repayment is expected.
Written explanations for any large deposits or employment gaps.

You’ll complete the Uniform Residential Loan Application (Form 1003), which has specific sections for projected rental income on multi-unit properties. The rental-income calculation flows from what you report there and what the appraiser confirms, so those sections deserve close attention. Closing costs on FHA loans typically run 2% to 6% of the loan amount, so between down payment, upfront MIP, and closing costs, price the full picture before you start shopping.

1
U.S. Department of Housing and Urban Development. Does FHA Require a Minimum Credit Score and How Is It Determined
2
U.S. Department of Housing and Urban Development. HUD’s Federal Housing Administration Announces 2026 Loan Limits
3
U.S. Department of Housing and Urban Development. FHA Mortgage Limits
4
U.S. Department of Housing and Urban Development. FHA Single Family Housing Policy Handbook
5
U.S. Department of Housing and Urban Development. What Is the FHA Mortgage Insurance Premium Structure for Forward Mortgage Loans
6
Fannie Mae. Appraisal Report Forms and Exhibits
7
U.S. Department of Housing and Urban Development. 203(k) Rehabilitation Mortgage Insurance Program Types