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Keep the Business in a Divorce: 401(k) Offset vs. a 5-Year Buyout Note on a $150,000 Business (After-Tax Math at 7%+ Mortgage Rates)

Dana runs an S-corp design studio. Her husband Marcus works for a hospital system. They're divorcing, and neither wants to sell the business. Dana wants to keep it, and Marcus wants his fair share without becoming her lender.

This is a worked example I built for illustration, not a real case. The marital estate looks like this:

AssetValueTax character
Home (worth $450,000, mortgage balance $250,000 at 3.1%)$200,000 equityMostly tax-free if it's your primary residence
Dana's 401(k)$300,000Pre-tax
The business$150,000Illiquid, valuation is an opinion
Brokerage account$50,000Mostly after-tax
Total$700,00050/50 = $350,000 each

If Dana keeps the business, Marcus is owed $75,000 of its value. There are two main ways to pay it. Dana can hand over more retirement money through a QDRO (the court order that splits a retirement plan), or she can pay him over time with a buyout note. This post compares those two, with a third variant, an interest-free note, in the table.

Why the Timing Matters: What This Week's Numbers Say

Several current data points bear on this choice.

  • Mortgage rates: NerdWallet's "Mortgage Rates Today, Friday, October 2" reports rates dropped a bit, but the relief is minimal and they're still above 7%. That matters if either spouse needs to refinance the $250,000 loan.
  • Inflation: The Bureau of Labor Statistics' "Major Economic Indicators" page shows the Consumer Price Index up 0.4% in August 2026. If that pace repeated every month, prices would rise about 4.9% over a year (1.004¹² ≈ 1.049). That's a stress test, not a forecast. It does show what a slow, fixed payment stream is up against.
  • Jobs: Unemployment is 4.2% for September, and payroll employment is up only 29,000 (preliminary). Hiring is thin, which matters if a business owner's revenue softens or a spouse is looking for work.
  • Wages: Average hourly earnings rose $0.05 (preliminary). Paychecks aren't keeping pace with a 0.4% price month.

Together these point to one thing. A promise to pay later is worth less when prices are rising, wages are flat, and the paying business is exposed to a slow job market.

Head-to-Head: Three Ways to Pay Marcus His $75,000

The comparison assumes a 22% marginal tax rate on retirement withdrawals and a 7% interest rate on the note, to match the mortgage-rate environment. Both are illustrations, so swap in your own numbers.

Offset with 401(k) (QDRO)5-year note at 7%5-year note at 0%
What Marcus receives$96,154 pre-tax$1,485/month × 60 = $89,106$1,250/month × 60 = $75,000
Value to Marcus in today's dollars$75,000 after-tax equivalent$75,000 (by construction, before tax on interest)About $66,600 at 4.9% inflation, about $69,600 at 3%
Main risk to MarcusMarket swings, tax when he withdrawsThe business stops payingThe business stops paying, plus inflation erosion
Main cost to Dana$96,154 of tax-deferred money leaves her account$14,106 in interestMarcus will likely push back
Tax notesTaxed when Marcus withdrawsInterest is generally taxable. Ask a CPA how principal and interest are treatedSame

This is the kind of side-by-side Sevalori runs for you, so you don't have to build the spreadsheet yourself.

The $21,154 Gross-Up Most Offsets Skip

Many settlements say "the business is worth $150,000, so Marcus gets $75,000 more of the 401(k)." That treats a pre-tax dollar like an after-tax dollar.

  • Dollar-for-dollar offset: $75,000 pre-tax × (1 − 22%) = $58,500 after-tax to Marcus. He's short $16,500.
  • Properly grossed-up offset: $75,000 ÷ 0.78 = $96,154 pre-tax, which is $21,154 more than the naive number.

The gross-up moves with the tax bracket. At 12% it's $85,227. At 24% it's $98,684. At 32% it's $110,294. A one-line clause in the settlement can shift tens of thousands of dollars. I covered the same trap from the house side in Keep the $580,000 House or Take the 401(k)? The After-Tax Divorce Settlement Math.

One more tax detail. Cash paid directly out of a QDRO to the alternate payee (the receiving spouse) generally avoids the 10% early-withdrawal penalty, but it's still taxed as income. If Marcus rolls it into his own IRA first, later pre-59½ withdrawals can carry the penalty. If he needs cash soon, for example a rental deposit, that difference matters.

The Break-Even on the Note: It's the Interest Rate

From Dana's side, the 7% note costs $14,106 more in nominal dollars than the offset's $75,000 after-tax equivalent. In exchange, she keeps $96,154 of tax-deferred money invested.

The break-even is simple. In effect, Dana borrows $75,000 at 7% to keep $75,000 (after-tax equivalent) invested. The note wins for her only if the 401(k) she keeps earns more than 7% a year. If it earns 4%, she overpaid. If it earns 10%, she came out ahead. Nobody can promise which.

From Marcus's side the 7% note is worth the same as the offset on paper. The difference is risk. The offset sits in an account he controls. The note depends on Dana's business paying him every month for five years, in an economy with 4.2% unemployment and 29,000 new jobs. If you take a note, ask for security such as a lien on business assets, a personal guarantee, life insurance on the payer, and an acceleration clause that makes the whole balance due if a payment is missed.

The 0% note has an inflation problem on top of that. At a steady 3% inflation rate, $1,250 a month for 60 months is worth about $69,600 today, a loss of about $5,400. If August's 0.4% monthly pace stuck, the loss is about $8,400. Interest or a cost-of-living adjustment fixes that. I walked through the same idea for alimony in Fixed vs. COLA-Adjusted Alimony: The $114,000 Difference.

The Valuation Is the Softest Number

Every figure above hangs on the business being worth $150,000, and business valuations are opinions. Each $10,000 change in value moves Marcus's half by $5,000.

Business valueMarcus's half401(k) needed (22% gross-up)5-year note at 7%
$100,000$50,000$64,103$990/month
$150,000$75,000$96,154$1,485/month
$200,000$100,000$128,205$1,980/month

A $50,000 valuation disagreement shifts the 401(k) transfer by about $32,000 and the monthly note by about $495. If the two sides hire separate appraisers, expect that gap. Some states also limit "double-counting," where a business is valued as an asset and its income is counted again for alimony or child support. How that works depends on your state's rules.

What If Dana Also Keeps the House?

Say Dana wants both the business and the house, with Marcus taking the rest. The house adds its own cost, and the business buyout stacks on top of it.

Refinancing a $250,000 balance:

Existing loan at 3.1%Refinanced at 7%
Monthly principal and interest$1,068$1,663
10-year interest$68,900$164,100

This assumes a fresh 30-year schedule at each rate so the comparison isolates the rate effect. A real loan with years already paid down would show different totals. The gap in 10-year interest is about $95,200, and the payment jumps $595 a month.

Now stack the business:

  • Keep house + pay a 7% note: $1,663 + $1,485 = $3,148/month, up $2,080/month ($24,960 a year) from today's $1,068.
  • Keep house + settle the business with the 401(k) offset: $1,663/month, up $595/month ($7,140 a year).

The difference between the two paths is $1,485 a month, or $17,820 a year, of cash flow, which is the exact size of the note payment. Keeping everything and borrowing from your own business to do it is the combination I'd test hardest.

Before assuming you have to refinance, ask your loan servicer what's possible. Federal law generally blocks a lender from calling the loan due just because the house transfers to a spouse under a divorce decree. That's not the same as releasing the other spouse from the loan, so ask what the lender will actually do. For the full house-versus-retirement math, see Keep the House at 7%+ Rates or Split the 401(k) Instead?.

Business Credit Cards and Annual Fees

Two NerdWallet items this week are easy to read past, but each has a divorce angle.

  • "Should U.S. Bank's New Credit Cards be 'Essential' for Your Business?" covers two cards unveiled on Sept. 28, the U.S. Bank Business Essentials Visa Card and the Business Essentials Visa Signature Plus Card. A new business card isn't a settlement term, but business owners often sign personal guarantees on business credit, which can leave you personally liable for it. Some states and courts also restrict new debt while a divorce is pending, so ask before you apply. List every business card, who guarantees it, and who is an authorized user. Ask who owes the balance when the divorce is final.
  • "Chase, IHG Add $350-Annual-Fee Card and Overhaul Their 2 Existing Ones" reports a new card with a $350 annual fee, and the IHG One Rewards Premier World Elite Mastercard's fee is rising to $150. A household holding one of each pays $500 a year, which is $5,000 over ten years. After a split, each household may keep its own cards and pay its own fees. Check whether points or miles balances are listed in your settlement, and whether the fees belong in each person's new budget.

This is small money next to a $21,154 gross-up. NerdWallet's "Oct. 6 Is National Taco Day" roundup has BOGO tacos and discounts, and a good deal is nice. A recurring fee on a card you don't use is the same kind of leak, just quieter. The big decisions still deserve the most attention.

Which Option Fits Which Situation

The 401(k) offset tends to fit when:

  • The business has thin or unpredictable cash flow, or the owner may need to reinvest profits.
  • The owner has enough retirement assets to cover a grossed-up transfer.
  • The receiving spouse wants certainty and doesn't want to be a creditor.

The buyout note tends to fit when:

  • The owner's retirement account is small, and the offset would drain it.
  • The business is stable, with reliable cash flow and documented profit.
  • The receiving spouse can get real security and wants the interest income.
  • The owner expects to earn more than the note rate on the money they keep.

Neither is the right answer when:

  • The business is separate property because it was started before the marriage, which changes the math in most states.
  • A third option, such as selling the business or splitting ownership, beats both.
  • The valuation is far off from what you assumed.

The rules behind this vary by state. In community property states (nine of them), 50/50 is the default starting point. In equitable distribution states, "equitable" doesn't mean equal, and alimony and child support formulas differ state by state. For the broader mechanics, see How Equitable Distribution Actually Works: A $650,000 Marital Estate Breakdown.

Your Numbers Will Differ

Dana and Marcus's example uses a $150,000 valuation, a 22% tax rate, a 7% note, a 3.1% existing mortgage, and a $250,000 balance. Change any one and the answer moves. A 32% bracket, a $200,000 valuation, or a business that grosses $80,000 less than expected can flip the ranking of these options.

The data this week adds pressure from several directions. Mortgage rates are still above 7%, August prices rose 0.4%, unemployment is 4.2%, and hiring is slow. A note that looks fine at signing can look different a year later. An offset that looks painful today can look better if a business slows down.

Before you sign, run the offset, the note, and the house together for your own estate. You can model your business, your retirement accounts, your mortgage, and your state's rules at Sevalori, so you see the after-tax, cash-flow, and risk numbers side by side.

Sources

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