Unmarried Couples Buying a House in Iowa: Joint Tenancy vs. Tenants in Common

Pooling savings with an unmarried partner, sibling, or close friend to buy a single-family home in Des Moines, Cedar Rapids, or Iowa City is an increasingly popular way to build equity. However, signing a warranty deed at the closing table without understanding Iowa real property presumptions can leave a surviving partner facing eviction by a deceased partner's estranged relatives or trapped on a 30-year mortgage after a breakup.

Unlike married spouses who benefit from automatic statutory survivorship presumptions and equitable property division rules under Iowa divorce statutes, unmarried co-buyers are treated as legal strangers by the courts. Consulting a local Iowa real estate lawyer from our directory before closing allows unmarried buyers to select the right deed structure and execute an enforceable cohabitation and buyout contract.

Joint Tenancy vs. Tenancy in Common Under Iowa Law

In Iowa, the exact phrasing printed in the granting clause of your recorded deed controls who owns the property and what happens if one co-owner passes away. Under Iowa Code § 557.15(1), any conveyance of real estate to two or more unmarried individuals automatically creates a tenancy in common unless a contrary intent is expressly stated in the deed instrument. While Iowa Code § 557.15(2)(a) creates a statutory presumption of joint tenancy with rights of survivorship for grantees identified as married to each other, unmarried couples, friends, and siblings receive zero automatic survivorship protection.

Survivorship Rights and Probate Consequences

Choosing between Iowa's two primary co-ownership structures determines whether your share passes to your co-buyer or enters probate:

• Tenancy in Common (Default for Unmarried Buyers): Each co-owner holds a distinct, undivided fractional share of the property (which can be 50/50 or unequal, such as 70/30, if stated on the deed). There is no right of survivorship. If one owner dies, their fractional interest passes under their Last Will and Testament or via intestate succession to their biological heirs, requiring formal administration in probate court.
• Joint Tenancy with Right of Survivorship: Created only when the deed expressly includes phrases such as 'as joint tenants with full rights of survivorship and not as tenants in common' pursuant to Iowa Code § 557.15(2)(b). All joint tenants hold equal, undivided shares. When one joint tenant dies, their interest automatically extinguishes and vests 100% in the surviving joint tenant outside of probate upon recording an Affidavit of Surviving Joint Tenant.

Importantly, a joint tenancy is not permanent. In In re Estate of Johnson, 739 N.W.2d 493 (IA Supreme Court 2007), the court adopted an intent-based test holding that a joint tenancy can be unilaterally severed if one owner executes a valid conveyance instrument evidencing intent to destroy the survivorship right. Building on that rule, the court held in Grout v. Sickels, 985 N.W.2d 144 (IA Supreme Court 2023) that when an unmarried joint tenant transferred her undivided interest in a lake property into her revocable living trust without her co-owner's knowledge, the deed severed the joint tenancy into an equal 50/50 tenancy in common.

Drafting an Iowa Cohabitation and Property Buyout Agreement

Because verbal promises concerning real estate are unenforceable under the Iowa Statute of Frauds (Iowa Code § 622.32), unmarried buyers should sign a written Cohabitation and Co-Ownership Agreement before closing. Furthermore, as confirmed in Grout v. Sickels, 985 N.W.2d 144 (IA Supreme Court 2023), once a joint tenancy is created, Iowa courts presume a 50/50 split upon partition and generally only allow equitable adjustments for value-enhancing improvements made after the deed was signed-meaning a partner who contributed 90% of the initial down payment can lose half of that money without a written contract.

• Down Payment and Equity Tracking: Specify the exact dollar amount each buyer contributed toward earnest money, down payment, and closing costs, and state that those capital contributions must be reimbursed off the top before net sale proceeds are divided.
• Buyout Formula and Right of First Refusal: Establish a clear appraisal mechanism (such as averaging two licensed Iowa certified residential appraisals) and a 60-to-90-day refinancing window allowing one partner to buy out the other at a pre-set percentage of fair market value minus hypothetical broker commissions.
• Expense Allocation and Sweat Equity: Detail how monthly principal, interest, taxes, insurance (PITI), HOA dues, and major capital repairs (roof, HVAC, foundation) are split.

What Happens If One Partner Stops Paying the Mortgage?

When two unmarried buyers co-sign a promissory note and mortgage, they are jointly and severally liable to the lender. If one partner moves out and stops paying their half of the mortgage, the lender can foreclose on the entire home and ruin both borrowers' credit scores. If the remaining partner refuses to sell or refinance voluntarily, the departing partner's legal remedy is filing an equitable partition action under Iowa Code § 651.2. In Coyle v. Kujaczynski, 759 N.W.2d 637 (IA Court of Appeals 2008), the court ruled that an unmarried co-owner residing in a jointly titled Iowa home cannot assert statutory homestead rights to block her ex-partner from forcing a court-ordered partition sale of the house.

Federal and Iowa Tax Implications for Unmarried Co-Owners

• Mortgage Interest Deduction (26 U.S.C. § 163(h)): Lenders issue Form 1098, Federal, IRS, Mortgage Interest Statement only to the primary borrower listed first on the loan. Unmarried co-owners who itemize deductions must attach a written calculation to their federal Schedule A showing the exact percentage of mortgage interest and Iowa property taxes each person actually paid from separate funds.
• Federal Gift Tax Risks (26 U.S.C. § 2503(b)): If one partner puts down $80,000 and the other puts down $0, but they title the home 50/50 as joint tenants, the IRS may treat the excess $40,000 equity transfer as a taxable gift exceeding the annual federal gift tax exclusion, requiring the filing of Form 709, Federal, IRS, United States Gift (and Generation-Skipping Transfer) Tax Return.
• Iowa Inheritance Tax Repeal (Iowa Code § 450.10): For deaths occurring on or after January 1, 2025, Iowa completely repealed its state inheritance tax, meaning an unmarried partner who inherits a co-owner's share via joint tenancy survivorship no longer owes the former up-to-15% state inheritance tax.

Step-by-Step Process to Structure Your Purchase in Iowa

Step 1: Select Your Title Vesting Before Signing the Purchase Offer

Decide whether you want equal survivorship rights (Joint Tenancy) or proportional, inheritable shares (Tenancy in Common) and instruct your real estate lawyer to insert the exact statutory language required by Iowa Code § 557.15 into the Warranty Deed.

Step 2: Execute and Record a Memorandum of Co-Ownership Agreement

Have an Iowa real estate attorney draft a comprehensive Cohabitation and Property Agreement waiving or governing partition rights under Iowa Code § 651.2, and record a short Memorandum of Agreement against the property title.

Step 3: Record the Deed and Tax Forms with the County Recorder

At closing, submit the notarized Warranty Deed along with Form 57-006, Iowa, Department of Revenue, Real Estate Transfer Declaration of Value and, if applicable, Form 542-0960, Iowa, Department of Natural Resources, Groundwater Hazard Statement to the local recorder, such as the Polk County Recorder's Office, Des Moines, the Linn County Recorder's Office, Cedar Rapids, the Scott County Recorder's Office, Davenport, or the Johnson County Recorder's Office, Iowa City.

How Much Does It Cost to Structure Co-Ownership in Iowa?

• Cohabitation & Buyout Agreement Drafting: Hiring an Iowa real estate attorney to draft a customized co-ownership contract typically costs $750 to $1,800.
• County Recording and Auditor Fees: Recording a deed or memorandum costs $7 for the first page ($5 base fee plus $1 records management and $1 electronic transaction fee under Iowa Code § 331.604) and $5 for each additional page, plus a $5 per-parcel transfer fee paid to the county auditor under Iowa Code § 331.507.
• Real Estate Transfer Tax: Paid at closing (customarily by the seller) at a rate of $0.80 per $500 of consideration above the first $500 under Iowa Code § 428A.1, overseen by the Iowa Department of Revenue, Des Moines.
• Contested Partition Litigation Costs: If a couple breaks up without an agreement and files a partition suit in the Polk County District Court, Des Moines or the Linn County District Court, Cedar Rapids, the court filing fee is $215, and referee, appraisal, auction, and legal fees under Iowa Code § 651.12 often consume $8,000 to $25,000+ of home equity.

How Long Does the Process Take in Iowa?

Drafting a custom co-ownership agreement and reviewing abstract title opinions takes 5 to 10 business days prior to a standard 30-to-45-day mortgage closing. By contrast, if co-owners split up without a buyout contract and litigate a contested partition by sale in an Iowa District Court, the court-supervised referee, appraisal, and public sale process typically takes 9 to 18 months.

Frequently Asked Questions (FAQ)