Fannie Mae Form 181, the Agreement for Modification, Re-Amortization, or Extension of a Mortgage, is the standardized document your servicer uses to lock in the lower monthly payment that follows a large lump-sum principal payment on a conventional loan. The servicer fills it out, you sign it in front of a notary, and once it is recorded with the county it becomes a binding amendment to your original note and mortgage. You can download a blank copy from Fannie Mae’s legal documents page at singlefamily.fanniemae.com.1Fannie Mae. Fannie Mae Legal Documents
When Form 181 Applies
The usual trigger is a mortgage recast. You make a substantial extra payment toward principal, and the servicer re-amortizes the loan over the remaining term at the same interest rate. The balance is smaller, so the monthly payment drops. Rate and maturity date stay put.2Fannie Mae. Recast Loan Overview The form can also document a straight term extension or another minor administrative change, but recasts are the primary use.
Form 181 is not the document for loss mitigation, forbearance, or any change to the interest rate structure. It also does not apply to FHA, VA, or USDA loans — those cannot be recast. Only conventional loans owned or guaranteed by Fannie Mae (or Freddie Mac, which uses the same uniform instrument) are eligible.
Curtailment Minimums and Fees
Fannie Mae does not publish a universal minimum principal curtailment, but individual servicers typically require at least $10,000 before they will process a recast. Some accept multiple principal payments totaling that threshold within a three-month window. Expect a servicer administrative fee of roughly $150 to $500. Your servicer may also require at least one on-time payment after the curtailment before processing begins.
Where to Get the Form
Fannie Mae publishes Form 181 on its website with the other uniform legal instruments, in both PDF and editable Word format.3Fannie Mae. Publication of Legal Documents In practice, borrowers rarely need to hunt for it. The servicer prepares the document and sends it to you for signature. If you want to review the layout before your servicer contacts you, search “Form 181” on singlefamily.fanniemae.com or ask your servicer for a blank copy.
Information the Form Requires
Whether the servicer is drafting or you are checking the draft, every one of these fields must be accurate. Mistakes here can cloud title or make the modification unenforceable.
- Original loan date and principal amount, taken from the first page of your original promissory note.
- Recording information for the existing mortgage: the Book and Page number or Instrument Number assigned by the county recorder when the mortgage was first filed. This links the modification to the existing lien in public records.
- The legal description of the property, copied exactly as it appears in the recorded mortgage or deed of trust. A transposed lot number or missing easement reference can cloud title.
- The current unpaid principal balance after the lump-sum curtailment has been applied and posted.
- The interest rate. In a standard recast it does not change, but the form still requires you to state it.
- The new monthly principal and interest payment, calculated by amortizing the reduced balance over the remaining term at the existing rate. The servicer’s software produces the figure; you can verify it against any standard amortization calculator.
- The maturity date. Enter the original maturity date for a straight recast, or the new date if the modification also extends the term.
If the loan has an adjustable rate, the form also captures the current principal and interest payment as of the modification date.4Fannie Mae. Guidelines for Delivering Required Fields for Recast Loan The underlying index, margin, caps, and next rate change date are still governed by the original note; the recast does not alter them.
Completing the Form
Form 181 typically runs two to three pages. The top section identifies the borrower, the lender or servicer, the property address, and the original loan. The middle section states the modification: the new principal balance, the new monthly payment, and the effective date. The bottom section is the signature block and notary acknowledgment.
Use month-day-year format throughout. Match dollar amounts to the servicer’s ledger to the penny. In a straight recast, several fields will simply restate the original terms. Fill them in anyway. Blank fields invite questions during title review. Cross-check every figure against the original note and the servicer’s payment history before anyone signs.
Signing and Notarizing
Every borrower named on the original mortgage must sign. An authorized officer of the servicer or lender signs on behalf of the institution. Because the document modifies a recorded real estate interest, most jurisdictions require notarization. Notary fees for a single acknowledgment usually fall between $5 and $25 depending on the state’s statutory cap, and the servicer generally covers this as part of the recast charge.
If a borrower on the original note has died, transferred their interest, or been removed through a divorce decree or assumption agreement, the servicer has to address that before the modification can proceed. Only parties currently obligated on the note should sign.
Recording the Modification
Once everything is signed and notarized, the servicer sends Form 181 to the county recorder’s office (sometimes called the Registrar of Deeds) where the original mortgage was recorded. Recording fees vary by county and typically run from $30 to $150 depending on page count and local surcharges. The servicer generally pays and may pass the cost through in the recast fee.
Recording puts the public on notice that the terms have changed and protects the lender’s lien priority. Fannie Mae’s Servicing Guide directs the servicer to determine, in compliance with applicable law, whether the borrower must execute Form 181 to keep the mortgage in first-lien position and fully enforceable.5Fannie Mae. Processing Additional Principal Payments After the county processes the filing, the original goes back to the servicer for permanent storage with the note and mortgage.
If You Have a Second Mortgage or HELOC
A junior lien can complicate the recast. Your first-mortgage servicer may require a subordination agreement from the junior lienholder before finalizing the modification, on the theory that recording a change to the first mortgage could give the junior lien an argument for priority. A simple recast that lowers the payment without increasing the debt is unlikely to prejudice a junior lienholder in practice, but servicers and title insurers tend to be cautious.
Fannie Mae publishes a uniform Subordination Agreement (Modified Mortgage) as Form 3748 for this exact situation.1Fannie Mae. Fannie Mae Legal Documents Getting a junior lienholder to sign can add weeks, especially if the two servicers need time to coordinate. Raise any second mortgage or HELOC with your servicer at the start of the recast request so it does not stall later. Some servicers also obtain an ALTA 11 title insurance endorsement to insure against any loss of priority caused by the modification; whether the cost is passed to the borrower depends on the servicer and state.
How Long the Process Takes
From the day you submit the recast request and lump-sum payment to the day the lower payment kicks in, plan on roughly 45 to 60 days. The servicer has to verify the payment has cleared, calculate the new amortization, prepare Form 181, send it to you for signature, get it notarized, record it, and update your account. Keep making your existing payment amount until the servicer formally notifies you of the new one.
Delays cluster around three things: a junior lien that needs subordination, a backed-up county recorder’s office, and holiday-season timing. A two- or three-month wait for the new payment to take effect is normal. When the updated amortization schedule arrives, check the figures against your signed Form 181. Keep the recorded modification with your other loan documents. You will want it when you sell or refinance later.
Effect on PMI
A large curtailment can pull your loan-to-value ratio below 80 percent, which puts you in a position to request private mortgage insurance cancellation right away rather than waiting for scheduled amortization. Under the Homeowners Protection Act, you can request PMI cancellation at 80 percent of the home’s original value, and the servicer must automatically terminate PMI when the balance is scheduled to hit 78 percent of original value.6Federal Reserve. Homeowners Protection Act of 1998 Cancellation typically requires a good payment history, no subordinate liens (or a waiver), and evidence that the property has not declined below its original appraised value. The servicer may order a valuation at your expense. Ask before assuming the savings.
Tax Treatment
A standard recast does not create cancellation-of-debt income. You paid down principal voluntarily, and the balance dropped by exactly what you paid. There is nothing for the IRS to tax. The picture is different only if a modification forgives part of the principal you did not pay, in which case the forgiven amount is generally reported on Form 1099-C.7Internal Revenue Service. Cancellation of Debt – Principal Residence That scenario sits outside the typical Form 181 recast. If it ever comes up in a broader workout, talk to a tax professional about the exceptions and exclusions that may apply.