Fannie Mae's 15% reserve rule: what your board needs to do before 2027

In March 2026, Fannie Mae and Freddie Mac issued coordinated policy updates — Lender Letter LL-2026-03 and Bulletin 2026-C — that change how condominium projects qualify for the mortgages most buyers use. The headline: for loan applications dated on or after January 4, 2027, a condo association's budget must allocate at least 15% of its annual assessment income to replacement reserves, up from today's 10% — unless the association has a current reserve study and funds it at the study's highest recommended level (CAI's summary of both updates, verified September 2026).

If your board is building its 2027 budget this fall, this is the season to decide which path you're on.

What changed, and when

Three dates matter:

1. March 18, 2026 — Fannie Mae issued LL-2026-03 and Freddie Mac issued Bulletin 2026-C, aligned changes to condo project eligibility.
2. August 3, 2026 (already in effect) — the limited review process is retired for most projects. Historically a large share of condo loans skipped deep project scrutiny; now the full review, which examines the budget's reserve line, is the norm.
3. January 4, 2027 — for loan applications dated on or after this day, the minimum reserve allocation rises from 10% to 15% of annual budgeted assessment income.

The combination is the point: more loans get their project's budget actually reviewed, and the bar that budget must clear goes up.

Why a lender rule reaches your board

Neither GSE regulates your association directly. The mechanism is indirect and sharper: when an owner sells, the buyer's lender reviews the project. If your budget doesn't meet the requirement, the unit can become ineligible for conforming loans — the most common mortgages in the market. Your owners feel it as fewer qualified buyers, longer sales, and pressure on prices. The rule arrives at your board table through your neighbors' closings.

The math for your budget

Take a 100-unit community collecting $500,000 a year in assessments. Today's floor puts $50,000 into reserves. The 2027 floor puts $75,000 — a $25,000 jump, about $21 per unit per month, before any other budget pressure. Communities that have hovered at the 10% minimum for years face the full step at once, in the same season insurance and vendor costs are climbing.

Whether 15% is even enough is a separate question — the flat percentage is a floor, not a plan, and how much your HOA should actually have in reserves depends on your component inventory, not a ratio.

Now run the other path. Suppose that community's current reserve study recommends $62,000 a year at its highest funding level. Funding the study costs $13,000 less than the flat 15% — and it qualifies. For an older building the comparison can flip: a study might recommend $90,000 where 15% is only $75,000, and a board that picks the flat percentage to save money is choosing to underfund a documented need with its eyes open. Price both paths before you pick one.

The exemption is the strategy

The escape hatch matters more than the rule. The 15% allocation is not required when the association:

1. has a reserve study conducted or updated within the last three years, and
2. is funding at the study's highest recommended level — with baseline funding (letting the balance skim zero) explicitly disqualified.

Read that as the GSEs saying the quiet part out loud: they don't actually want 15% — they want evidence you know your real number and are paying it. For a well-run association, the exemption is usually the cheaper and sounder path: a study-based funding plan is tailored to your components, while the flat 15% can overshoot a new community and undershoot an old one.

Two traps inside the exemption. First, the three-year clock: a study from 2022 doesn't qualify, so if yours is stale, commissioning the update is now a lending-eligibility issue, not just good practice. Second, "highest recommended level" — most studies present more than one funding scenario, and only funding to the strongest one qualifies. If your board adopted the study but budgets to its cheapest scenario, you're outside the exemption.

How lenders will actually check

This isn't an honor system. Under the full review, the lender reads the association's adopted budget and computes the reserve allocation against assessment income; if the association relies on the study path instead, Selling Guide B4-2.2-02 requires the lender to obtain and retain the study itself and confirm the association's funding meets its recommendations (verified September 2026). Practically, that means your management company or board will be asked for the budget, the study, and evidence the two agree — usually via the project questionnaire that lands whenever a unit goes under contract. Communities that keep those three documents consistent answer in a day; communities that don't become the reason a closing slips.

A board checklist for 2027 budget season

1. Pull the study's date. Older than three years (or heading there before 2027)? Schedule the update now — preparers book out during budget season.
2. Find your two numbers. Current reserve allocation as a percent of assessment income, and the study's highest recommended contribution. One of those is your compliance path.
3. Choose the path and write it down. Either budget 15%+, or budget the study's recommendation and keep the study current. Lenders' project questionnaires will ask; make the answer findable.
4. Model the dues impact and communicate early. A stepped increase adopted this fall beats a scramble next year — owners take a well-presented budget far better than a surprise, and far better than the special assessment that chronic underfunding eventually forces.
5. Put it in the minutes. A recorded board decision — which path, which numbers, which study — is what turns a compliance question into a one-line answer.

If you do nothing

There's no fine and no letter from Fannie Mae. There's just a January morning when a buyer's lender runs the full review, the budget shows 10%, there's no qualifying study on file — and a sale in your community stalls. Multiply by every future closing. The boards that treat this as a 2027 problem will discover it was a 2026 budget decision.