What Are the Tax Implications of Divorce?

The four tax rules that change the most money in a divorce are these: alimony is no longer deductible or taxable for any decree entered after 2018, property transfers between spouses are tax-free but carry the original cost basis with them, only one parent can claim a child as a dependent, and your filing status is set by your marital status on December 31. Get those four right and most of the tax implications of divorce take care of themselves. Get the basis rule wrong and a “50/50” settlement can leave one spouse with 30% less after tax.

That last point is the one worth reading twice.

Is Alimony Still Tax Deductible After Divorce?

No, not for any divorce or separation instrument executed after December 31, 2018.

The Tax Cuts and Jobs Act eliminated the alimony deduction for the paying spouse and the corresponding income inclusion for the recipient. This was a permanent change, and it is still the rule in 2026.

What this means in practice:

• The payer gets no deduction, so support is paid with after-tax dollars
• The recipient reports nothing and pays no federal tax on it
• Older decrees executed on or before December 31, 2018 keep the old treatment, deduction and inclusion, unless the parties modified the instrument and expressly adopted the new rules

The negotiating consequence is direct. Because support now costs the payer more per dollar delivered, the pre-2019 practice of trading a large deductible support number for a smaller property share no longer works the same way. Settlement math built on the old deduction is simply wrong.

Colorado accounts for this in its guideline formulas. Under C.R.S. 14-10-114 the maintenance calculation has separate deductible and non-deductible versions, and the child support statute applies a multiplier of 1.25 or 1.33 to non-deductible maintenance when it flows into the child support calculation.

Are Property Transfers in a Divorce Taxable?

Not at the time of transfer, which is the good news. The trap is what happens later.

Under Internal Revenue Code Section 1041, transfers of property between spouses incident to divorce produce no recognized gain or loss. But the receiving spouse takes the transferor’s original cost basis. The tax bill does not disappear. It moves.

Here is why “equal” is rarely equal. Three accounts, each worth $500,000:

• A Roth IRA: qualified withdrawals are tax-free. Real value close to $500,000
• A traditional 401(k): every dollar is taxed as ordinary income on withdrawal. Real value may be $370,000 at a 26% effective rate
• Stock purchased for $80,000: $420,000 of built-in capital gain. Real value roughly $415,000 after federal capital gains tax

Take the Roth and give your spouse the 401(k), and you have quietly gained six figures. This is the single most common expensive mistake in divorce settlements, and it is entirely avoidable by asking for cost basis on every account before you agree to anything.

How Do You Divide Retirement Accounts Without Triggering Tax?

Each account type uses a different instrument, and using the wrong one creates a taxable event.

• 401(k), 403(b), and other qualified employer plans require a qualified domestic relations order. A QDRO lets the plan pay the other spouse directly, and a distribution made under a QDRO is exempt from the 10% early withdrawal penalty
• IRAs are not divided by QDRO. They move by transfer incident to divorce under Section 408(d)(6), which is a trustee to trustee transfer. Withdraw the money and hand it over instead, and you owe tax plus a likely 10% penalty
• Pensions in payout need an explicit survivor benefit decision, which is a valuation question as much as a tax one

Our step-by-step QDRO guide covers the filing sequence, and the Texas retirement account guide covers characterization on the community property side.

Who Claims the Children After a Divorce?

One parent, and by default it is the one the children live with more nights during the year.

The custodial parent claims the child and the associated credits unless they sign IRS Form 8332, which releases the claim to the other parent. A divorce decree alone does not override the tax code. If your decree says the other parent claims the child in even years, someone still has to sign Form 8332 each of those years.

What follows the dependent claim, and what does not:

• The child tax credit follows the dependent claim and can be released with Form 8332
• Head of household status does not transfer. It stays with the parent who paid more than half the cost of a home the child lived in for more than half the year
• The child and dependent care credit does not transfer either. It stays with the custodial parent
• Medical expenses you actually pay for your child can generally be deducted even if the other parent claims the dependent

In Colorado, HB 25-1159 gave courts expanded discretion over how tax dependency is allocated between parents as part of the child support order, effective March 1, 2026. Raise it during the case rather than after.

What Filing Status Should You Use the Year You Divorce?

Your status is determined by your marital status on December 31. Divorced on December 30 means single for the entire year. Still married on December 31 means you file jointly or separately, even if you separated in February.

That timing is negotiable, and it is worth modeling. Filing jointly usually produces a lower combined bill, but it also creates joint and several liability, meaning the IRS can pursue either spouse for the whole amount. If you have any doubt about your spouse’s reporting, married filing separately costs more and protects more.

If a joint return has already created a problem, Section 6015 provides innocent spouse relief for tax attributable to the other spouse’s erroneous items.

One state-specific wrinkle: in Texas, a community property state, spouses who file separately generally must each report half of the community income. That makes separate filing more complicated than it is in Colorado, which uses equitable distribution and no community income allocation.

What About the House?

Section 121 lets you exclude up to $250,000 of gain on a primary residence, or $500,000 for a married couple filing jointly, if you owned and lived in it for two of the last five years.

The sequencing matters:

• Sell while married and filing jointly and you may keep the full $500,000 exclusion
• Sell after the divorce and each of you is generally limited to $250,000
• If one spouse stays in the home, a written agreement can preserve the departing spouse’s use test in some circumstances

On a long held Front Range or Texas metro home, the difference between those two paths can exceed $50,000 in tax.

Divorce Tax Questions We Hear Most

Do I pay tax on a lump sum property settlement?

Generally no, if it is a division of marital property under Section 1041. But you inherit the basis, so future tax is still coming.

Is child support taxable?

No. Child support is not deductible by the payer and not taxable to the recipient, and never was.

Can we still file jointly if we are separated?

Yes, if you are legally married on December 31. Weigh the savings against joint liability for the whole return.

Who claims the mortgage interest deduction?

Generally the spouse who actually pays it and is liable on the loan. If both pay, each deducts their share.

Build the Tax Analysis Into the Settlement, Not After

Tax is not a post-divorce cleanup task. It changes what a fair split looks like, so it belongs in the negotiation.

1. Request cost basis on every account before you propose or accept a division
2. Convert every asset to after tax value and compare those numbers, not the account balances
3. Model both filing statuses for the year of divorce before you agree to a decree date
4. Get Form 8332 language into the decree, with a signing obligation, not just an allocation
5. Update withholding and beneficiary designations the week the decree enters

Flatiron Legal Advisors handles divorce alongside estate planning and tax sensitive asset division in the same firm, which matters when a settlement touches retirement accounts, a business, or appreciated property. Talk with our Colorado divorce attorneys or Texas divorce attorneys about how the numbers actually land.

Schedule a consultation to review your settlement on an after-tax basis.