If your loan is being written to be sold to Fannie Mae, the insurance policy has to match its Selling Guide, and that check happens before the file clears. These are Fannie Mae’s requirements for the loans it purchases, not a federal or Massachusetts rule, and your own lender can tell you what its file needs.
The deductible cap
For a one to four unit property, the maximum allowable deductible for all required perils is 5% of the property insurance coverage amount. If the policy sets separate deductibles for different required perils, such as windstorm or wildfire, each individual deductible must not exceed the same 5%. A deductible set high to bring the premium down can put the policy over that line, which is worth checking before you bind it.
The perils the policy has to cover
The guide says policies on one to four unit properties should be written on a Special coverage form or equivalent, and that at a minimum the coverage must include the perils in its table: fire or lightning, explosion, windstorm (including named storms designated by the National Weather Service or NOAA), hail, smoke, aircraft, vehicles, and riot or civil commotion. If a policy excludes or limits any of them, the borrower has to obtain acceptable coverage for that peril, which can be a stand-alone policy.
Replacement cost, and the roof
Coverage sufficiency turns on the loss settlement terms. The policy has to provide coverage on a replacement cost basis, with the exception of roofs. Roofs must be insured, but they don’t have to be insured on a replacement cost basis. The guide also notes that some insurers write actual cash value terms for personal property and for structures that aren’t buildings, and that this is acceptable.
The insurer’s rating
The policy securing a first mortgage has to be written by an insurer that meets one of four rating requirements: an AM Best Financial Strength Rating of B or better, a Demotech Insurance Financial Stability Rating of A or better, a Kroll Bond Rating Agency Insurance Financial Strength Rating of BBB or better, or an S&P Global Insurer Financial Strength Rating of BBB or better. An insurer only has to meet the category at one of those agencies, even if several of them rate it.
Who picks, and what the lender sees
The guide opens by saying the borrower has the right to select the insurer of their choice, as long as the insurance meets the requirements. The lender’s job is to verify that a valid policy exists and meets them. It may accept a certificate of property insurance instead of the complete policy, as long as the certificate carries everything needed to make that determination and is signed by the insurer.
What to do with this
Get a quote while the inspection period is still open, so the premium and the deductible are known before you’re committed. Ask your loan officer whether the file wants the policy itself or a signed certificate, and send it over well before the closing week. Under agreement? Send me the quote before you bind it. This is general information, not insurance advice. Diana Kim, REALTOR®, eXp Realty.
Questions
Common questions
How high can my deductible be?
Under Fannie Mae's Selling Guide, the maximum allowable deductible for all required perils on a one to four unit property is 5% of the property insurance coverage amount, and separate peril deductibles each must not exceed that.
What has the policy got to cover?
At a minimum, fire or lightning, explosion, windstorm, hail, smoke, aircraft, vehicles, and riot or civil commotion. If the policy excludes or limits one, the borrower needs acceptable coverage for that peril separately.
Does the roof have to be covered at replacement cost?
No. Roofs are carved out of the replacement cost rule, but they still have to be insured. The policy has to settle losses on a replacement cost basis with the exception of roofs.
Can I choose my own insurance company?
Yes. The guide says the borrower has the right to select the insurer of their choice, provided the insurance meets the requirements, including the insurer's financial strength rating.
Does my lender need the whole policy?
Not always. A lender may accept a certificate of property insurance signed by the insurer, if it carries all the information needed to confirm the policy meets the requirements.
Sources
- Author's count of the rows in the Required Perils table in the Fannie Mae Selling Guide, Property Insurance Requirements for One-to Four-Unit Properties (edition dated 08/05/2026): fire or lightning; explosion; windstorm (including named storms designated by the U.S. National Weather Service or the National Oceanic and Atmospheric Administration by a name or number); hail; smoke; aircraft; vehicles; riot or civil commotion.
- Author's count of the rows in the rating table in the Fannie Mae Selling Guide, General Property Insurance Requirements for All Property Types: AM Best Company ('B' or better Financial Strength Rating); Demotech, Inc. ('A' or better Insurance Financial Stability Rating); Kroll Bond Rating Agency ('BBB' or better Insurance Financial Strength Rating); S&P Global ('BBB' or better Insurer Financial Strength Rating).
- Fannie Mae Selling Guide, Evidence of Property Insurance, Overview and Certificates of Property Insurance: 'The lender or servicer must verify the existence of a valid insurance policy that meets Fannie Mae's requirements.' 'A lender or servicer may accept a certificate of property insurance in lieu of a complete property insurance policy if the certificate includes all of the information needed for the lender or servicer to determine whether the insurance meets Fannie Mae's requirements. The certificate of property insurance must be signed by the insurer.' Note: 'If a lender is unable to determine whether the applicable insurance policy meets Fannie Mae's requirements, the associated loan is not eligible for purchase by Fannie Mae.'
Written by Diana Yeji Kim — REALTOR® at eXp Realty, serving Greater Boston in English, Korean, and Japanese.
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