The quick read: Both agencies changed their multifamily insurance rules in October 2026, with one shared start date for new business. Freddie Mac's Bulletin M2026-5, dated October 20, 2026, applies its insurance changes to new loans under Seller Application on or after October 26, 2026 and to existing loans at insurance policy renewals on or after December 18, 2026. Fannie Mae's Guide Update 26-27 applies to loans placed under application on or after October 26, 2026 and to policy renewals on or after January 18, 2027. The items that move an owner's file: blanket limits must cover the largest Total Insurable Value (TIV), Freddie Mac's ordinance-or-law Coverage A ties to its 90% rule for multiple-building properties, Freddie Mac requires terrorism liability by TRIA endorsement or stand-alone policy, and both agencies now define the 500-year flood zone that their existing named storm storm surge rule points to.
What did Freddie Mac change on October 20?
Freddie Mac's Bulletin M2026-5, dated October 20, 2026, updated its multifamily insurance chapter in six places, and four of them change what an apartment owner's insurance package must show: blanket limits, the named storm flood zone definition, ordinance-or-law Coverage A and terrorism liability. The changes apply to new loans under Seller Application on or after October 26, 2026.
The other two insurance items cover seniors housing professional liability and co-op directors' and officers' policy forms. Outside insurance, the same bulletin changed interest rate cap requirements and Forward Commitment notice rules.
Freddie Mac bulletin: M2026-5, dated October 20, 2026 New loans (Freddie Mac): under Seller Application on or after October 26, 2026 Existing loans (Freddie Mac): insurance policy renewals in Servicing on or after December 18, 2026
Blanket limits (Section 31.3). The bulletin says the Seller/Servicer must confirm that blanket insurance limits cover the largest TIV for single- or multi-building properties, per Section 31.5. The redlined chapter pairs that check with a review of the Statement of Values and the geographic concentration of insured values, and says the review must not rely solely on probable maximum loss results from risk modeling reports. For an owner with several properties on one blanket program, the shared limit is tested against the biggest single property in it.
Named storm (Section 31.7(c), stamped 10/20/26 in the redline). The bulletin's change clarifies that the FEMA 500-year flood zone is designated Zone B or Shaded X, an area with a 0.2% annual chance of flooding. The rest of the section is current guide text. For properties in Tier 1 Windstorm Risk counties, as defined by the insurer, stand-alone Named Storm coverage must meet the property damage and business income requirements of Sections 31.5 and 31.6, except deductibles. If the Named Storm coverage does not include flooding due to storm surge, the borrower must maintain flood insurance for any building in a FEMA 500-year flood zone equal to or exceeding the maximum coverage available through NFIP policies or their equivalent. A blanket Named Storm limit may not be less than 90% of the largest individual TIV on the policy.
Ordinance or law (Section 31.12). Coverage A, the loss to the undamaged portion of the property, now refers to Section 31.5, which the bulletin says allows insurable value equal to 90% for multiple-building properties. Ordinance or law cover is required only for a property that is non-conforming under current building, zoning or land use laws. The redline's own example: a property with an insurable value of $20 million and a 60% damage threshold needs a Coverage A limit of at least $8 million. Coverage B (demolition) and Coverage C (increased construction cost) must each equal no less than 10% of estimated insurable value, and buildings of 5 stories or more need an Increased Period of Restoration endorsement.
Terrorism liability (Section 31.16). The bulletin clarifies that terrorism liability requires a Terrorism Risk Insurance Act (TRIA) endorsement or a stand-alone policy, which may be written on an occurrence-based or claims-made form.
What did Fannie Mae change?
Fannie Mae's Guide Update 26-27, effective 10/26/26, updated Part II, Chapter 5, Property and Liability Insurance, to clarify general policy requirements, strengthen Blanket Policy requirements, expand the rules for acceptable evidence of insurance and ordinance or law insurance, and add guidance for named storm insurance. It applies to loans placed under application on or after October 26, 2026.
Fannie Mae update: Guide Update 26-27, effective 10/26/26 New loans (Fannie Mae): placed under application on or after October 26, 2026 Existing loans (Fannie Mae): insurance policy renewals on or after January 18, 2027
Blanket policies. The guide text effective October 26, 2026 says the lender must confirm that Blanket Insurance Limits are limited to one per-occurrence shared limit, reinstate to pre-loss limits after a casualty except for earthquake, flood and terrorism, are at least 100% of estimated TIV for a single-building property and 90% for a multiple-building property, and are sufficient to cover the largest TIV. The lender must document its blanket analysis in the servicing file with supported conclusions.
Evidence of insurance. The same text requires evidence of insurance at closing and permanent evidence within 90 days after delivery. For a loan of $10 million or less, the MBA Evidence of Insurance commercial property form qualifies; above $10 million, or for a layered blanket program, it means duplicate copies of the primary policies with a signed carrier letter. Declarations pages (except for an NFIP policy), single policy endorsements, binders and certificates of insurance do not qualify as permanent evidence.
Ordinance or law. When a property is non-conforming, Fannie Mae requires ordinance or law cover for all perils, even on a stand-alone policy. Coverage A must be at least 100% of estimated insurable value for a single-building property, or 90% for a multiple-building property, minus the damage threshold in the local building ordinance, or 50% of insurable value when the ordinance sets no threshold. Fannie Mae's own example: a $10 million single-building property with a 75% threshold needs $2.5 million of Coverage A, and $4.5 million when Coverages A, B and C are combined.
Named storm (Section 502.02). The update's named storm addition is guidance defining the 500-year zone; the 90% coverage and storm surge requirements are current guide text. The new guidance describes that zone as Zone X (Shaded), formerly Zone B, with a 0.2% annual chance of flooding. Under the current requirements, separate named storm insurance is required when the policy form excludes wind-related catastrophic events and the property is in a Tier I named storm county, as defined by the insurer. Coverage must equal at least 90% of TIV on a stand-alone policy, or of the largest individual property on a blanket policy. If the policy does not cover storm surge flooding, the borrower keeps flood insurance on buildings in the 500-year flood zone equal to the maximum available through NFIP policies or their equivalent.
Deductibles: current text, not a new rule. The guide text effective October 26, 2026 caps wind/hail deductibles at 5% of the collateral's TIV and named storm and earthquake deductibles at 7.5%, or, when expressed only as a dollar value, $50,000 below $10 million of insurable value and $100,000 at $10 million or more. The Guide Update 26-27 summary does not list deductibles among its primary changes, so treat these as the caps already in force.
When does it hit my existing loan?
An existing agency loan meets the new insurance text at its first policy renewal on or after the agency's renewal date, which is December 18, 2026 for a Freddie Mac loan and January 18, 2027 for a Fannie Mae loan, while a new loan application dated October 26, 2026 or later is underwritten to the new text.
The trigger for an existing loan is the policy renewal, not the loan's maturity. A refinance into a new agency loan is a new application, so the October 26, 2026 date governs it. For the coverage types lenders ask for on any commercial loan, see what property insurance a commercial lender requires.
Table: Agency insurance requirements after the October 2026 updates, Freddie Mac versus Fannie Mae
| Requirement | Freddie Mac | Fannie Mae | New loans from | Renewals from |
|---|---|---|---|---|
| Requirement Blanket limits | Freddie Mac Must cover the largest TIV for single- or multi-building properties (Section 31.3) | Fannie Mae Must be sufficient to cover the largest TIV; at least 100% of TIV single-building, 90% multiple-building | New loans from October 26, 2026 (both) | Renewals from December 18, 2026 (Freddie Mac); January 18, 2027 (Fannie Mae) |
| Requirement Ordinance or law Coverage A | Freddie Mac Refers to Section 31.5, allowing 90% of insurable value for multiple-building properties (Section 31.12) | Fannie Mae 100% single-building or 90% multiple-building insurable value, minus the local damage threshold; 50% with no threshold | New loans from October 26, 2026 (both) | Renewals from December 18, 2026 (Freddie Mac); January 18, 2027 (Fannie Mae) |
| Requirement Named storm | Freddie Mac Clarifies that the 500-year zone is Zone B or Shaded X, 0.2% annual chance; the Tier 1 Windstorm Risk county rule and the storm surge flood rule at the NFIP maximum are current text (Section 31.7(c), stamped 10/20/26) | Fannie Mae Adds guidance defining the 500-year zone as Zone X (Shaded), formerly Zone B, 0.2% annual chance; the Tier I county rule, the 90% of TIV minimum and the storm surge flood rule are current text (Section 502.02) | New loans from October 26, 2026 (both) | Renewals from December 18, 2026 (Freddie Mac); January 18, 2027 (Fannie Mae) |
| Requirement Terrorism liability | Freddie Mac TRIA endorsement or stand-alone policy required, occurrence or claims-made form (Section 31.16) | Fannie Mae Terrorism insurance for property damage and liability exposures (Section 502.05); not listed among the update's primary changes | New loans from October 26, 2026 (Freddie Mac) | Renewals from December 18, 2026 (Freddie Mac) |
| Requirement Evidence of insurance | Freddie Mac Not in the bulletin's insurance list | Fannie Mae Permanent evidence within 90 days after delivery; binders and certificates not acceptable as permanent evidence | New loans from October 26, 2026 (Fannie Mae) | Renewals from January 18, 2027 (Fannie Mae) |
| Requirement Deductible caps | Freddie Mac Wind/hail 5% of TIV when expressed as a percentage (Section 31.7(b), dated 12/16/25) | Fannie Mae Wind/hail 5% of TIV; named storm and earthquake 7.5% | New loans from Current text, not new | Renewals from Current text, not new |
Between October 26, 2026 and the renewal dates, one owner can hold two files under two standards: a new acquisition or refinance underwritten to the new text, and an existing loan whose policy renews under the old text until its renewal falls on or after the agency date.
What should I check before renewal?
Before your next renewal, have your insurance broker test the policy against four items in the agency guide text: whether the blanket limit covers your largest property's TIV, whether named storm cover includes storm surge, whether ordinance-or-law Coverage A is sized correctly, and whether terrorism liability is written by TRIA endorsement or stand-alone policy.
The documents that answer those questions are the same ones the agencies tell lenders to collect:
- Statement of Values. Freddie Mac's Section 31.3 names the Statement of Values, evidence of coverage and portfolio risk modeling results, plus addresses, buildings and stories, building insurable value and rental value. Fannie Mae calls it a Schedule of Values.
- Flood zone for every building. Confirm whether any building sits in Zone B or Shaded X, and whether the named storm policy covers storm surge. If it does not, those buildings need a flood policy at the NFIP maximum. If a remap moved a building into a different zone, read how a flood map change can affect an apartment refinance.
- Zoning status. A legal non-conforming property needs ordinance or law cover with Coverages A, B and C, plus the Increased Period of Restoration endorsement if any building is 5 stories or more.
- Terrorism liability form. Ask for the TRIA endorsement or the stand-alone policy by name, not a general statement that terrorism is covered.
- Evidence format (Fannie Mae). Line up a copy of the policy, or the MBA form for a loan of $10 million or less, because binders and certificates do not count as permanent evidence.
- Deductibles. Freddie Mac's Section 31.5(b), dated 12/16/25, lets the Servicer approve expanded deductibles on an existing loan for property or liability policies other than NFIP, windstorm and earthquake insurance. The cap is $100,000 below $10 million of insurable value and $150,000 at $10 million or more. The borrower must be unable to obtain a compliant deductible and must show liquidity of at least four times the maximum deductible, and the loan and property must meet its risk rating, payment history and condition tests. The waiver is valid for one policy term, and the Servicer may renew it.
On a loan with an insurance escrow, an added flood policy or higher limit flows into the monthly escrow deposit, so price the renewal before it binds.
How do you get an agency apartment loan placed under the new insurance rules?
Getting an agency apartment loan placed under the October 2026 insurance rules starts with an insurance package that already meets the new text on the day the application is dated, and our first recommendation, as the publisher of this guide, is YieldStack, a commercial mortgage brokerage that compares lender terms and negotiates on the borrower's side.
YieldStack is an AI-native commercial mortgage brokerage that arranges financing for commercial real estate investors. Software matches the deal against 20,000+ loan programs and compares the options; human brokers structure the deal, negotiate on the borrower's side and carry it toward closing. YieldStack reports a median first offer in under an hour, from an institutional lender. Every credit decision is made by the lender; YieldStack arranges the introductions and negotiates on the borrower's side, and no loan, rate, or closing is guaranteed.
That fits an agency deal this quarter because the insurance file is part of the structure. A broker reading the package can flag a blanket limit below the largest TIV, or a named storm policy without storm surge cover, before a lender sees it, and comparing term sheets side by side shows each lender's escrow and reserve terms beside the rate. It costs Zero upfront to submit a deal and review offers; YieldStack's broker fee is 0.50–1.00% of the loan amount and is paid only at closing.
The package that gets comparable agency quotes carries:
- Statement of Values for every property on the blanket program
- Flood zone determination for every building, with the named storm policy form
- Zoning report showing conforming or legal non-conforming status
- Current policies and the renewal dates for each one
- Target loan amount, term and the date you plan to apply
When the package is ready, send the apartment deal for review. Agency programs are summarized on the agency loans page.
The bottom line
Freddie Mac and Fannie Mae both changed their multifamily insurance rules in October 2026 and apply the new text to applications from October 26, 2026. Existing loans follow at renewal: December 18, 2026 for Freddie Mac and January 18, 2027 for Fannie Mae. Before either date, check the blanket limit against your largest TIV, the named storm form for storm surge, ordinance-or-law Coverage A and the terrorism liability form.