Quick answer: Selling first avoids carrying two homes and is often the simpler order when your next down payment is in your current house; buying first, if you are financing, depends on a lender confirming in writing what you can carry while you own both. A contingent offer under Rider V can make your purchase depend on your sale, though the seller may answer with Rider X, a kick-out clause, and a rent-back under Rider U lets you stay after closing if you and the buyer agree on written terms by the deadline. Fannie Mae's updated rules, which lenders were encouraged to use immediately and must use for applications on or after November 1, 2026, count 75 percent of documented market rent on the home you are leaving, minus that home's payment. In September 2026 the median St. Lucie County single-family home took 52 days to go under contract and the median time to sale was 91 days, so plan for time. None of this replaces a lender's written approval or an attorney's reading of your contract.
If you are selling one Treasure Coast home and buying another, the order turns on two numbers: how much of your next down payment is sitting in your current house, and how much payment a lender will let you carry while you own both.
Should I sell my house first or buy first?
Selling first gives you known proceeds and one house at a time, at the cost of a deadline on your search. Buying first gives you one move and no deadline, at the cost of carrying two homes. A contingent offer and a rent-back each borrow from both.
Time is the variable: in September 2026 the median St. Lucie County single-family home took 52 days from listing to contract, up from 44 a year earlier, and the median time to sale was 91 days, up from 85 (MIAMI REALTORS, October 16, 2026). In Martin County the medians were 39 days to contract, against 62, and 78 days to sale, against 109. About half of those homes took longer, and the medians cover only homes that sold, so if you buy first, budget for yours being one of the slower ones.
Sell first, buy first, contingent offer or rent-back: how they compare
| Path | How it works | Upside | Watch for |
|---|---|---|---|
| Sell first | You close on your current home, then buy. | Known proceeds; never two homes. | A deadline on your search, and possibly a place to live in between. |
| Buy first | You close on the next home while you own the current one, sometimes with a bridge loan or a home equity line of credit (HELOC). | One move, no deadline on your search. | Two sets of payments until the old home closes; the lender must qualify you for both or count rent on the old one. |
| Contingent offer | Rider V, Sale of Buyer's Property, makes your purchase depend on selling your home. | A potential way out if your home does not sell. | The seller may add Rider X, a kick-out: if the seller accepts a back-up contract, you must add funding and waive the contingency by the designated date or the back-up can go forward. |
| Rent-back | Rider U, Post-Closing Occupancy by Seller: you sell, close and stay for an agreed time. | Sale proceeds in hand before you buy, without moving out at closing. | Length of stay and rent need a written agreement by a deadline (default 10 days before closing), or either party may cancel. |
Buying first: how a lender counts the house you still own
Under Fannie Mae's Selling Guide (B3-6-06, September 2, 2026), if your current home will not close before the new loan, the lender qualifies you with both payments, the old home's PITIA (principal, interest, taxes, insurance and association dues) and the new one's, unless it has the executed sales contract on the current home and confirmation that any financing contingencies have been cleared. If the old home becomes a second home, its PITIA counts as debt; if it becomes a rental, the guide's rental income and reserve rules apply.
Fannie Mae updated those rental rules on September 2, 2026, encouraged lenders to use them right away, and requires them for loan applications dated on or after November 1, 2026 (Announcement SEL-2026-08). The framework relies on market-supported rents, reserves and limits on the PITIA offset rather than leases, and the guide says lease agreements are not permitted for any departing residence. Under the updated B3-3.8-05, market rent is documented by an appraisal with market rents, Form 1007, or market analysis tools with at least three comparable rentals. The lender takes 75 percent of the monthly gross rent and subtracts the old home's PITIA; a positive result offsets only that PITIA, and a negative one goes into your debt-to-income ratio (DTI). With less than 12 months of property management experience, you need six months of the vacated home's PITIA in reserves, in addition to any reserves required for multiple financed properties. For an application dated before November 1, 2026, your lender may be using either the new rules or the earlier version, which I did not review.
| Hypothetical example | Amount | Basis |
|---|---|---|
| Documented market rent on the home you are leaving | $2,400 a month | Assumed; appraisal, Form 1007 or three comparable rentals |
| 75 percent of market rent | $1,800 a month | B3-3.8-05 |
| Old home's PITIA | $2,100 a month | Assumed |
| 75 percent of rent minus PITIA | $300 a month short | $1,800 minus $2,100; goes into DTI |
| Reserves, under 12 months of management experience | $12,600 | Six months of $2,100 |
In this example the old house adds $300 a month to your debts instead of $2,100, but needs $12,600 in reserves. Your lender decides what counts.
A bridge loan or a HELOC can reach the equity in your current house before you sell. Fannie Mae accepts a bridge or swing loan as a source of funds (B3-4.3-14, April 1, 2009) if it is not cross-collateralized against the new property and the lender documents that you can carry the new home, the current home, the bridge loan and your other payments. The federal ability-to-repay requirements in 12 CFR 1026.43(c) through (f) do not apply to a bridge loan with a term of 12 months or less, so ask the bridge lender how it is evaluating you and what happens if the term ends before your house sells. The CFPB describes a HELOC as a line with a draw period, then a repayment period, usually at a variable rate; the lender may freeze draws if your finances change, and falling behind could cost you your home.
Can my offer depend on selling my house? Rider V and the kick-out
The Florida Realtors/Florida Bar AS IS contract lists its riders in paragraph 19, and Rider V, Sale of Buyer's Property, makes your purchase depend on selling your current home. Florida Realtors' legal staff, in a September 2023 article, describe it as a potential way out if the buyer cannot sell, and say a buyer with a financing contingency who must sell another property to buy, and needs that covered for loan approval, must use it. I did not find a public copy of Rider V, so I cannot quote its time periods, what it lets the seller keep doing, or how long you have to remove the contingency; read the rider itself, with a Florida real estate attorney if anything is unclear.
The seller may answer with Rider X, the Kick-Out Clause. The same article says it lets the seller keep entering back-up contracts, and if the seller accepts one, the buyer must add funding and waive contingencies such as the sale of the buyer's property; if the buyer does not pay the additional funding by the designated date, the seller can go forward with the back-up offer. A contingent offer buys time, not certainty. A seller weighing a Rider V offer should first ask where the buyer's own house stands: under contract, on the market, or not yet listed.
Can I stay in my house after closing? The rent-back
In the Florida Realtors/Florida Bar forms, a rent-back is Rider U, Post-Closing Occupancy by Seller. Florida Realtors' legal staff explained in June 2023 that the parties try to agree on a written lease or post-closing occupancy agreement by a deadline that defaults to 10 days before closing and can be negotiated, covering the length of occupancy and the monthly rent, and that a lease brings in Florida's Residential Landlord/Tenant Act. If no agreement is reached, either party may terminate and the buyer gets the deposit back; if neither terminates, the seller must move out by closing.
Ask about the buyer's loan, too. HUD's model FHA mortgage (September 2024) says the borrower shall occupy the property as a principal residence within 60 days after signing the security instrument and for at least one year, unless the lender determines the requirement would cause undue hardship, or extenuating circumstances beyond the borrower's control exist, and a lender's actual form may differ. With an FHA buyer, check the length of a rent-back with the buyer's lender.
Does the order affect my homestead and portability?
It can: Florida's homestead rules run on January 1. The exemption goes to a person who, on January 1, holds legal or beneficial title and in good faith makes the property a permanent residence (s. 196.031(1)(a)), and the application is due on or before March 1 (s. 196.011(1)(a)). Portability under s. 193.155(8) gives a new homestead an assessment reduction of up to $500,000 when you received a homestead exemption as of January 1 of any of the 3 immediately preceding years.
If you buy first and rent out the old home, renting all or substantially all of a former homestead is an abandonment of it (s. 196.061(1)), though abandonment after January 1 does not affect that year's exemption unless the home is rented more than 30 days per calendar year for 2 consecutive years. Renting can also affect the federal home-sale exclusion, which requires ownership and use as your principal residence for periods aggregating 2 years or more in the 5 years before the sale (26 U.S.C. 121(a)). Have the property appraiser and a CPA or tax adviser check your dates before you rent between homes.
What I could not confirm
I did not find a public copy of Rider V, and I could not confirm Rider X's deadlines or deposit amount beyond the "designated date" Florida Realtors describes. The 60-day figure comes only from HUD's model mortgage; I did not find one in Fannie Mae's occupancy section (B2-1.1-01, October 5, 2022) or retrieve HUD's handbook text. I did not check Freddie Mac's rules. The releases do not define "time to sale," and the Martin County release says "up from" for both day counts although its numbers fell; I used the numbers. I found no primary September 2026 release for Indian River County.
The right order is the one your numbers support. Before you list, find out what your current home is likely to sell for and net, then have a lender put in writing what you can carry under each path. A home value request and my guide to the cost of selling a home in Florida cover the first half.
More for Treasure Coast sellers: my guides on why a Port St. Lucie house is not selling, what Florida sellers must disclose, selling a home with an old roof, homestead portability, capital gains when you sell your home and selling an inherited home.
Questions sellers ask about selling first or buying first
Should I sell my house first or buy first?
Selling first avoids carrying two homes and lets you shop knowing your proceeds; buying first means one move but two sets of payments until the old house closes. Which fits depends on where your down payment is and what a lender confirms in writing that you can carry.
Can my offer depend on selling my current house?
Yes, if the seller accepts it. Rider V, Sale of Buyer's Property, makes a Florida Realtors/Florida Bar purchase contract depend on selling your home, and Florida Realtors' legal staff say a buyer with a financing contingency who must sell another property and needs that covered for loan approval must use it. The seller may answer with Rider X, a kick-out clause that lets the seller keep entering back-up contracts.
Can I stay in my house after closing?
Yes, if the buyer agrees. Under Rider U, Post-Closing Occupancy by Seller, the parties try to agree on a written lease or occupancy agreement covering the length of stay and monthly rent by a default deadline of 10 days before closing; if they do not, either party may terminate.
Will my lender count both mortgages if I buy first?
Under Fannie Mae's Selling Guide (B3-6-06, September 2, 2026), if your current home will not close first, yes, unless the lender has the executed sales contract and confirmation that any financing contingencies have been cleared. If you will rent the old home out, the departing residence rental rules can offset part or all of its payment.
Can rent from my old home help me qualify?
Under Fannie Mae's updated rules, which lenders were encouraged to use immediately and must use for applications on or after November 1, 2026, the lender takes 75 percent of documented market rent and subtracts the old home's payment, and a negative result goes into your debt-to-income ratio. With under 12 months of property management experience, you also need six months of that home's payment in reserves.
Will I lose portability if I buy my next home later?
Florida's portability test is whether you received a homestead exemption as of January 1 of any of the 3 immediately preceding years, with a $500,000 cap (s. 193.155(8)). Ask the county property appraiser which January 1 is the last one that works for your dates.
Talk with William. Text me the address of the home you are selling and what you hope to buy next, or call and talk it through. I will pull the closed sales that set your likely price, estimate what the sale could net, and lay out the four paths side by side so you can take real numbers to your lender. Call or text (772) 800-2274 or send a message.
General information, not legal, tax, lending or insurance advice, and not a guarantee of any sale, price or timeline. Fannie Mae encouraged lenders to use its updated departing residence rules immediately and requires them for applications on or after November 1, 2026, I did not find a public copy of Rider V or confirm the Rider X deadlines, and homestead and portability timing turns on your own dates; confirm with your lender, a Florida real estate attorney, the county property appraiser and a CPA or tax adviser. Statute, rule and market references are as reviewed on October 24, 2026. William Merchant, REALTOR®, RE/MAX Gold. Each RE/MAX office is independently owned and operated. Equal Housing Opportunity.
Sources
- Fannie Mae Selling Guide B3-6-06, Qualifying Impact of Other Real Estate Owned (September 2, 2026)
- Fannie Mae Selling Guide B3-3.8-05, Rental Income from Non-Subject Property: Departing Residence (September 2, 2026)
- Fannie Mae Announcement SEL-2026-08, Selling Guide updates (September 2, 2026; lenders encouraged to implement immediately, required for applications on and after November 1, 2026)
- Fannie Mae Selling Guide B3-4.3-14, Bridge/Swing Loans (April 1, 2009)
- Fannie Mae Selling Guide B2-1.1-01, Occupancy Types (October 5, 2022)
- HUD: Model Forward Mortgage, Section 6, Occupancy (September 2024)
- CFPB: 12 CFR 1026.43, Minimum standards for transactions secured by a dwelling, (a)(3)(ii) bridge loans
- CFPB: What is a home equity line of credit (HELOC)? (last reviewed August 28, 2026)
- Florida Statutes 196.031, Exemption of homesteads (2026)
- Florida Statutes 196.011, Annual application required for exemption (2026)
- Florida Statutes 193.155, Homestead assessments, including (8) portability (2026)
- Florida Statutes 196.061, Rental of homestead to constitute abandonment (2026)
- 26 U.S.C. 121, Exclusion of gain from sale of principal residence (Cornell LII)
- Florida Realtors: Think you know optional clauses, riders and addenda? Riders V and X (Meredith Caruso, September 26, 2023)
- Florida Realtors: The most misunderstood form in the library, Rider U (Joel Maxson, June 23, 2023)
- MIAMI REALTORS + RWorld: St. Lucie County Mid-Market Condo Sales Rise, September 2026 statistics (October 16, 2026)
- MIAMI REALTORS + RWorld: Martin County Total Home Sales Climb, September 2026 statistics (October 16, 2026)
