New Hampshire Divorce Tax Implications: What the IRS Expects

New Hampshire has no state income tax on wages, which simplifies the state-level picture. But federal tax rules govern every property transfer in a divorce, and getting them wrong can cost tens of thousands of dollars. The three areas that catch the most people: property transfers between spouses, the hidden tax inside retirement accounts, and the home sale exclusion timing.

Property Transfers Are Tax-Free (With Conditions)

Under IRC Section 1041, transfers of property between spouses — or between former spouses if "incident to divorce" — are completely tax-free. No capital gains tax, no gift tax, no income tax. The receiving spouse takes the property at the transferring spouse's original cost basis.

"Incident to divorce" means the transfer happens either:

• Within one year of the divorce becoming final, or
• Under the terms of the divorce decree or settlement agreement

This covers the standard property division: transferring title to the house, splitting investment accounts, dividing personal property. As long as the transfer is part of the divorce settlement and happens within the timeline, no tax event occurs.

The catch is the cost basis transfer. When you receive property under Section 1041, you inherit the original owner's purchase price as your tax basis. If your spouse bought stock at $20,000 and it's now worth $80,000, you receive the stock tax-free — but when you eventually sell it, you'll owe capital gains tax on the $60,000 gain, just as your spouse would have.

Embedded Tax Liabilities in Retirement Accounts

A $100,000 balance in a traditional 401(k) is not worth $100,000 in after-tax purchasing power. Every dollar withdrawn from a traditional 401(k) or traditional IRA is taxed as ordinary income at the recipient's marginal tax rate.

At a 22% marginal rate, that $100,000 account is worth roughly $78,000 after taxes. At a 32% rate, it's worth $68,000.

This matters enormously when negotiating property division. If one spouse keeps the house (equity that's potentially tax-free under the home sale exclusion) and the other gets the retirement account (fully taxable on withdrawal), an apparently equal dollar-for-dollar split actually favors the spouse with the house.

To negotiate fairly, discount retirement account values by the estimated future tax rate. A simple approach: apply the current marginal rate the receiving spouse would pay. A more sophisticated approach considers when the funds will be withdrawn and what the recipient's income and tax bracket will look like in retirement.

Roth accounts are different. Roth 401(k) and Roth IRA balances have already been taxed. Qualified withdrawals are entirely tax-free. When comparing assets of equal face value, a Roth account is worth more than a traditional account by the amount of the embedded tax.

The Home Sale Exclusion

When you sell your primary residence, federal tax law allows you to exclude up to $250,000 of capital gains from taxation if you're filing as single, or $500,000 if filing jointly. To qualify, you must have owned and used the home as your primary residence for at least 2 of the 5 years preceding the sale.

The timing of the sale relative to the divorce matters:

Selling before the divorce is final. If you sell the home while still legally married and file a joint return for that year, you can use the full $500,000 exclusion.

Selling after the divorce. Each former spouse gets their own $250,000 exclusion. The departing spouse must have lived in the home for at least 2 of the past 5 years to qualify. If they moved out more than 3 years before the sale, they lose their exclusion.

Deferred sale agreements. If one spouse stays in the home under a deferred sale arrangement (e.g., until the youngest child turns 18), the departing spouse's 2-of-5-year clock keeps running. A deferred sale that stretches beyond 3 years from the departure date puts the absent spouse's exclusion at risk.

Alimony Tax Treatment

Under current federal law (for divorce agreements executed after December 31, 2018), alimony is neither deductible to the payor nor taxable income to the payee. This is already built into New Hampshire's 23% alimony formula under RSA 458:19-a.

If Congress changes the law to restore the old deductibility rules, the New Hampshire formula automatically adjusts to 30%.

Filing Status in the Year of Divorce

Your tax filing status for the year depends on your marital status on December 31. If your divorce is finalized by December 31, you file as single (or head of household if you have a qualifying dependent) for the entire year. If you're still legally married on December 31 — even if you've been separated all year — you can file jointly or married filing separately.

Filing jointly for the last year of marriage often produces a lower combined tax bill, but both spouses are jointly and severally liable for the accuracy of the return. If you don't trust your spouse's income reporting, married filing separately is safer even if it costs more.

Child-Related Tax Benefits

The divorce decree should specify which parent claims the children as dependents. Only one parent can claim a given child, and the IRS default is the custodial parent. If you want the non-custodial parent to claim the child (often because they're in a higher tax bracket and the dependency exemption has more value), the custodial parent must sign IRS Form 8332 releasing the exemption.

The New Hampshire Divorce Financial Split & Asset Division Guide includes tax-adjusted asset valuation worksheets that apply estimated tax discounts to each asset class, so your settlement negotiation compares real after-tax values — not misleading face-value numbers.

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