1. The mortgage rate is often a little higher
Assistance is frequently bundled with a specific first mortgage product, and that product may not carry the market's best rate.
Housing agencies fund assistance partly through the pricing of the attached first mortgage. That can mean a rate premium versus what a strong-credit borrower might get shopping the open market. The size of the premium is program-dependent and changes between funding rounds — some programs price at or near market, others clearly above it.
In practice: On a $300,000 loan, a 0.5% rate premium is roughly $90–$100 more per month. If the assistance is $10,000, you are still ahead in the early years — but by year ten the premium may have consumed much of the benefit if you never refinance.
2. "Forgivable" usually means a silent second lien
Most assistance is recorded as a second mortgage against your home, even when no payment is ever due.
A silent second requires no monthly payment, but it is a real lien. It appears on title, it must be satisfied or subordinated for most future transactions, and it can be called due if you break a program condition. Some programs use a deferred repayable loan instead, which is owed in full regardless of how long you stay. Read which one you are signing.
In practice: A buyer who thinks they received a grant discovers at closing on a sale five years later that $12,000 has to come out of the proceeds because the forgiveness clock had not finished.
3. Refinancing needs the agency's permission
The assistance lien has to be resubordinated behind your new first mortgage, and that is a separate approval.
When rates drop, you cannot simply refinance. The program administrator must agree to stay in second position. Policies vary widely: some subordinate routinely for rate-and-term refinances, some charge a fee, some take weeks, and many refuse cash-out refinances outright. A refusal can force you to pay off the assistance to refinance at all.
In practice: Rates fall a full point. Your refinance saves $200 a month, but the agency will only subordinate for a rate-and-term refinance, so the $15,000 renovation cash-out you planned is off the table.
4. Recapture tax can apply to bond-funded programs
Some federally-backed mortgage revenue bond programs can claw back a portion of your gain if you sell early.
Recapture tax is tied to certain bond-funded first mortgages, not to every DPA program. Where it applies, the exposure commonly phases out over roughly a nine-year window and only bites if you sell at a gain and your income has risen above program thresholds. Many buyers who trigger the rules owe nothing. Some agencies reimburse borrowers who do owe. Ask specifically whether your loan is subject to recapture and get the answer in writing.
In practice: You sell in year four with a solid gain and a much higher income than at purchase. The recapture calculation applies — but because the capped amount is a share of gain and of the original loan, the actual bill may be far smaller than the worst case, or zero.
5. You have to actually live there
Nearly every program requires the home to remain your primary residence, and renting it out can be a default.
Occupancy is the condition programs enforce most consistently. Moving out, converting the property to a rental, or listing it short-term can trigger repayment of the full assistance amount, sometimes with interest. A few programs allow temporary hardship or military exceptions, but you generally have to request them before you move.
In practice: A job transfer in year three tempts you to rent the house out instead of selling. That likely converts a forgivable second into a bill due now — check the program agreement before you sign a lease.
6. Sellers sometimes hesitate on DPA offers
In competitive markets, an assistance-backed offer can be seen as slower or riskier than a conventional one.
Some assistance programs add layers: agency underwriting, an extra approval step, occasional property condition standards, and slightly longer timelines. Listing agents who have been burned before may steer a seller toward a cleaner offer. This is perception as much as reality — a well-prepared file with a program-experienced lender often closes on a normal timeline — but it is worth planning for.
In practice: Two offers at the same price: yours with agency assistance, theirs conventional. Countering with a firm closing date and a lender letter that names the program's typical turn time is what usually levels the field.
