An agreement to split proceeds of sale is a written contract among co-owners that states exactly how the money from a sale will be divided once liens, closing costs, and other agreed deductions are paid. It matters most for real estate, where a single ambiguity can freeze six-figure sums at escrow. Co-owners usually need one during a divorce, when dissolving a business holding, or when selling property inherited by several heirs. Put the terms on paper before the property is listed, and you avoid the last-minute disputes that stall closings and drain the proceeds in legal fees.
Start With the Deed
Before drafting anything, read how title is held. The form of co-ownership sets the default split, and an agreement that quietly contradicts the deed invites a challenge.
Under a tenancy in common, each owner can hold a different percentage. One person might own 60 percent and another 40, and those percentages control the equity split unless the owners agree otherwise. When a tenant in common dies, that share passes through their estate, not automatically to the other owners.
Joint tenancy is different. Every owner holds an equal share by definition. Two joint tenants each own half; three each own a third. If one dies, that share passes to the surviving owners automatically, regardless of what a will says. Proceeds follow the same equal-share rule unless a signed agreement overrides it.
Your agreement can depart from the deed. A 50/50 joint tenant who paid the entire mortgage for five years can negotiate a larger share to reflect that contribution. The document simply needs to acknowledge the existing title structure and state clearly that the parties have agreed to a different distribution. Skip this step and the closing agent will default to whatever the deed says.
Information to Gather Before Drafting
A vague agreement is almost as bad as no agreement. Most of the real work happens here.
Owners and the Property Itself
Collect the full legal names and current addresses of every person with an ownership interest. The names must match the deed exactly. If someone changed their name after the deed was recorded, note both. You also need the property’s legal description from the deed. A street address is not enough, because multiple parcels can share similar addresses.
Every Debt Secured by the Property
Request an official payoff statement from each lender with a mortgage or lien. Federal law requires mortgage servicers to provide an accurate payoff balance within seven business days of a written request.1Office of the Law Revision Counsel. 15 U.S. Code 1639g – Requests for Payoff Amounts of Home Loan Payoff figures change daily because interest keeps accruing, so the statement will include a per-diem charge. Work that daily rate into your math so the net proceeds number is realistic.
Look past the first mortgage. Identify any home equity line, contractor lien, tax lien, or judgment recorded against the property. Each one gets paid from the gross proceeds before any co-owner sees a dollar. Missing even a small lien can throw off the final numbers and delay disbursement while the title company sorts it out.
Terms the Agreement Needs
A template gives you structure; enforceability comes from the provisions you include.
The Distribution Formula
Specify whether each party receives a fixed percentage or a fixed dollar amount. A percentage split (say, 55/45) is more common because it adjusts automatically if the final price comes in higher or lower than expected. A fixed-dollar arrangement works when one party is buying out the other at a pre-negotiated price, but it leaves one side exposed if closing costs run high.
What Gets Deducted Before the Split
List every expense that comes off the gross price before the formula applies. At a minimum: real estate agent commissions, escrow and title fees, prorated property taxes, outstanding mortgage balances, and transfer taxes. Leaving deductions vague is the single most common drafting mistake. If the agreement just says “net proceeds” without defining what that means, you are inviting an argument at the closing table.
Credits for Unequal Contributions
If one co-owner has been paying more than their share of the mortgage, taxes, insurance, or maintenance, the agreement should say so and specify the reimbursement. Courts in partition actions routinely grant credits for these excess contributions, and your agreement should do the same preemptively. Keep receipts and bank statements for every contribution you plan to claim. A co-owner who paid the full property tax bill for three years while another contributed nothing has a legitimate claim to reimbursement from the proceeds before the balance is split.
A Dispute Resolution Clause
Include a provision requiring mediation or arbitration before anyone can sue. Real estate disputes that reach court take months and often cost more in legal fees than the amount in controversy. A mediation-first clause gives both sides a structured, lower-cost path to resolve disagreements about the final numbers, the deductions, or the timing of payment. If mediation fails, the clause can escalate to binding arbitration or leave the courthouse door open.
Get It in Writing
The Statute of Frauds requires contracts involving real estate to be in writing and signed by the parties to be enforceable.2Cornell Law Institute. Statute of Frauds A verbal promise to split the money evenly is worth nothing if your co-owner changes their mind at closing. The written agreement is what the escrow officer will follow when wiring funds, and it is your only real protection if the deal goes sideways.
Signing and Submitting the Document
Every co-owner must sign. Notarize the signatures to make the document harder to challenge; a notary confirms each signer’s identity and willingness, which shuts down later claims of forgery or coercion.
Electronic signatures are legally valid for this type of agreement under the federal ESIGN Act, which provides that a contract cannot be denied legal effect solely because it was signed electronically.3Office of the Law Revision Counsel. 15 USC 7001 – General Rule of Validity A reputable e-signature platform is a practical alternative when co-owners live in different cities. A small number of jurisdictions still require wet-ink signatures for documents recorded against real property, so check with your title company first.
Once signed, send originals to the escrow officer, title company, or closing attorney handling the sale. They will use the agreement as the instruction manual for wiring funds. Submit it at least seven to ten days before the anticipated closing date. Title companies build their settlement statements in advance, and a late submission can stall disbursement or force the company to hold funds in escrow until the instructions are clarified. If co-owners still disagree at closing, the title company will not guess; it will hold the disputed portion until the parties reach a resolution or a court orders distribution.
What Each Co-Owner Will Actually Keep
The split is only half the picture. Taxes can take a meaningful bite out of each share, and knowing the rules before closing helps you set realistic expectations.
Primary-Residence Exclusion
If the property was your main home and you owned and lived in it for at least two of the five years before the sale, you can exclude up to $250,000 of gain from your taxable income. Married couples filing jointly can exclude up to $500,000 if both spouses meet the use requirement and at least one meets the ownership requirement.4Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence The IRS measures gain as the sale price minus your adjusted basis (generally what you paid plus qualifying improvements), not gross proceeds.5Internal Revenue Service. Publication 523 – Selling Your Home
The exclusion applies per qualifying taxpayer. Two unmarried co-owners who both lived in the home could each exclude up to $250,000 of their respective share of the gain. A co-owner who never lived there, such as a sibling on the deed who rented elsewhere, does not qualify for any exclusion on their portion.
Inherited Property and Stepped-Up Basis
When you inherit property, your tax basis is generally the fair market value on the date the previous owner died, not what they originally paid.6Office of the Law Revision Counsel. 26 USC 1014 – Basis of Property Acquired From a Decedent This stepped-up basis often reduces or eliminates capital gains tax. If a parent bought a house for $80,000 and it was worth $400,000 when they died, your basis is $400,000. Sell it for $410,000, and you owe tax on only $10,000 of gain. Each heir’s basis is stepped up independently, so every co-owner who inherited calculates their own gain based on their share of the date-of-death value.
Rates and Reporting
Profit beyond the exclusion (or all of it if no exclusion applies) is taxed as a long-term capital gain when you owned the property for more than a year. For 2026, long-term rates are 0 percent, 15 percent, or 20 percent depending on taxable income.7Library of Congress. Expiring Provisions in the Tax Cuts and Jobs Act Each co-owner reports and pays tax on their own share based on their individual income.
The closing agent files a Form 1099-S with the IRS reporting gross proceeds paid to each seller, and you receive a copy.8Internal Revenue Service. Instructions for Form 1099-S The form goes out for every real estate sale of $600 or more. Having the split agreement in place before closing lets the closing agent issue each 1099-S for the correct share rather than attributing the full price to one seller, which spares you from explaining a mismatch to the IRS later.
If a Co-Owner Will Not Cooperate
Not every co-ownership ends with a handshake. When one owner refuses to sell, blocks the closing, or disputes the split, the law provides remedies. None of them are cheap or fast.
Partition
Any co-owner generally has the right to file a partition action asking a court to force a sale, even over the objections of every other owner. The court appoints someone to oversee the sale, and proceeds are distributed based on each owner’s fractional interest, adjusted for credits. A co-owner who paid more than their share of the mortgage, taxes, or insurance can receive a credit before the remaining balance is divided. Partition sales often fetch below-market prices because they move on a court timeline, and legal fees come out of the proceeds on top of that.
Breach of the Agreement
If a co-owner signs the agreement and then refuses to honor it at closing, the other parties can sue for breach of contract. Because real estate is considered unique under the law, courts can order specific performance, meaning the breaching party is compelled to follow through rather than simply pay damages. Getting there takes time and money, which is why the dispute resolution clause earns its place in the template. A mediation session that costs a few hundred dollars can resolve what would otherwise become a five-figure legal fight.
Prevention
The best protection is a detailed, signed agreement completed well before the property is listed. Define every deduction, state the split clearly, account for unequal contributions, and build in a dispute resolution path. A real estate attorney’s review is a fraction of what litigation costs, and a few hours of that review upfront can save months of uncertainty on the back end.