Alimony Buyout vs. Monthly Payments With Mortgage Rates Above 7% and Bond Yields Surging: The Present-Value Math on a $3,500/Month Order
Your spouse's attorney offers a $240,000 lump sum to end alimony now. Your current proposal is $3,500 a month for 8 years. Add it up and that's $336,000 in nominal dollars. Is $240,000 a good deal, a bad one, or roughly fair?
The answer depends on a few numbers most people never calculate: the discount rate, the state duration rules, how the payor would fund the payment, and whether the recipient can afford housing at today's interest rates. Several of those numbers moved this fall, and all five are in the example below.
Everything here is an illustrative example. Your numbers will differ based on your state, incomes, marriage length, and asset mix. Consult your attorney for legal questions.
What Changed This Fall That Touches Your Alimony Math
Three items from recent financial news matter for support negotiations. Two are indirect, but they affect the numbers.
Mortgage rates are still above 7%. NerdWallet's "Mortgage Rates Today, Monday, September 28: A Little Lower, But Still Above 7%" reports that rates fell slightly but remain solidly above 7%. If the recipient needs to keep or refinance the marital home, that rate decides how much of a support check goes to housing.
Bond yields have run up, and bond prices have fallen. CNBC's "Mounting bond losses may be a big tax issue for investors this year, but not a bad one" describes a Treasury selloff that creates sizable tax-loss harvesting opportunities to offset stock gains. That matters if the payor plans to fund a buyout from a bond portfolio. It also matters because higher yields raise the discount rate used to value a payment stream, which lowers the lump sum a payor can argue is fair.
California's billionaire tax is on the November ballot. The Tax Foundation's "California's Wealth Tax Explained (And Why It Might Fail)" raises open questions about revenue and legal challenges that could last years. This is not a divorce issue on its own. But a high-earning payor's state of residence affects how much they keep after tax, and if the payor moves after the decree, that can affect modification arguments. We can't predict the outcome, and neither can anyone else. That uncertainty is a reason to write clear terms into your agreement instead of leaving them to be worked out later.
The Worked Example: $3,500 a Month for 8 Years
The setup:
- Payor gross income: $150,000. Payee gross income: $45,000.
- Marriage length: 12 years.
- Proposed support: $3,500 a month for 96 months.
- Lump-sum offer: $240,000.
A stream of payments is worth less than the sum of its parts, because a dollar in year 8 is worth less than a dollar today. The standard monthly annuity formula gives the present value:
PV = payment × (1 − (1 + r)⁻ⁿ) ÷ r
Here r is the monthly discount rate and n is 96 months.
| Discount rate (annual) | Present value of $3,500 × 96 months | Lump sum of $240,000 vs. PV |
|---|---|---|
| 4% | about $287,000 | $47,000 short |
| 6% | about $266,000 | $26,000 short |
| 8% | about $248,000 | $8,000 short |
Even at an 8% discount rate, the $240,000 offer is slightly below the nominal-stream value. That's before counting the two risks that pull in opposite directions:
- Recipient risk. Payments stop if the payor dies, becomes disabled, or falls behind. Depending on your state and agreement, payments may also end on remarriage or cohabitation.
- Payor risk. Payments may be modified downward if the payor's income drops or they retire. We covered that in Alimony Modification After Early Retirement.
A lump sum removes both risks. Whether that trade is worth a discount is a personal decision. It should be a chosen discount, not an accidental one.
This is the kind of analysis Sevaryn runs for you, so you don't have to build the spreadsheet yourself. For more on picking the discount rate, see Alimony for 7 Years vs. a $185K Lump Sum.
Why the Discount Rate Isn't Just a Formality
The discount rate is what you could realistically earn on a lump sum with similar safety. When Treasury yields rise, that number goes up, and the same payment stream is worth less today. That is what the bond selloff described by CNBC does to your negotiation.
A payor's attorney will point to higher yields as a reason for a smaller lump sum. That's mathematically legitimate, so expect the argument. The recipient's counter is that a lump sum is only worth the yield if it's invested safely. A recipient who needs the cash to fund housing and living costs can't count on locking in a high yield.
If you want to see how rates shift these numbers, Alimony Lump Sum vs. Monthly Payments After the Fed's Rate Hike to 4% works through a comparable example.
Tax Treatment: Who Actually Pays What
For divorce instruments executed after 2018, alimony is not deductible by the payor and not taxable to the recipient at the federal level (the Tax Cuts and Jobs Act repealed the old IRC §71 and §215 treatment). For divorces finalized before 2019, the old rules can still apply. I explained the practical consequences in Alimony Lost Its Tax Deduction After 2018. State treatment varies, so ask your CPA.
That makes the funding source, not the alimony itself, the main tax question. A $240,000 lump sum is paid with after-tax dollars. The payor's cost depends on where the money comes from:
| Funding source | What the payor must liquidate to net $240,000 | Notes |
|---|---|---|
| Cash or savings | $240,000 | Interest on the savings was already taxed |
| Brokerage stocks with a large gain | More than $240,000 | Capital gains tax applies on the gain portion |
| Bond fund sold at a loss | Less tax drag | The loss can offset other gains |
| Pre-tax 401(k) or IRA | about $316,000 at a 24% marginal rate | $240,000 ÷ 0.76, ignoring state tax and any early-withdrawal penalty |
The last row is the important one. If the payor is under 59½, IRC §72(t) can add a 10% penalty on top of ordinary tax. The gap between a "$240,000 offer" paid from cash and one paid from a 401(k) can be over $75,000 in real cost to the payor. That gives the payor a reason to negotiate on funding source, and it gives you a reason to ask where the money is coming from.
The Bond-Loss Angle: A Real Planning Opportunity
The CNBC article notes that bond losses can offset stock gains. Here's how that works in a divorce.
Say the payor holds bonds bought for $200,000 that are now worth $170,000, an unrealized loss of $30,000. Under IRC §1211(b), net capital losses offset capital gains first, then up to $3,000 a year of ordinary income, with the remainder carried forward.
If the payor sells those bonds before the transfer, the $30,000 loss can offset gains elsewhere. At a 15% long-term capital gains rate, that's about $4,500 of tax saved. If the payor is in the 20% bracket plus the 3.8% net investment income tax, it's about $7,140.
Compare that to handing the bonds to the recipient directly. Under IRC §1041, transfers between spouses incident to divorce are non-taxable, and the recipient takes the transferor's basis. The built-in loss moves to the recipient, who may or may not be able to use it. The payor's chance to harvest the loss is gone.
Some cautions:
- Wash-sale rules (IRC §1091) can disallow the loss if the same or a substantially identical security is repurchased within 30 days.
- Losses inside a 401(k) or IRA can't be harvested. Only taxable accounts qualify.
- Unused capital loss carryovers from a prior joint return have their own allocation rules on separation. Ask your CPA how yours would be split.
The lesson is about ordering. Which asset gets sold, and who sells it, changes the after-tax cost of the same headline number.
Same Marriage, Different State: The Duration and Cap Effect
The table above assumes 8 years of support. In some states, that number is set largely by statute. In others it's open to argument.
Texas (Family Code Chapter 8) limits court-ordered spousal maintenance in most cases. A marriage of 10 to 20 years generally caps duration at 7 years. Monthly maintenance is capped at the lesser of $5,000 or 20% of the payor's average monthly gross income. Eligibility requirements apply, such as inability to earn enough for minimum reasonable needs.
California has no statutory formula for long-term spousal support. Courts weigh factors under Family Code §4320. For marriages of 10 years or more, courts treat the marriage as one of long duration and may retain jurisdiction indefinitely. Duration for shorter marriages often follows a rule of thumb of about half the length of the marriage, which is a guideline and not a rule.
Applying both to the same $150,000 payor with a 12-year marriage (illustrative only, not a prediction of any court's ruling):
| California-style outcome | Texas-style outcome | |
|---|---|---|
| Monthly amount | $3,500 | $2,500 (20% of $12,500 gross monthly income) |
| Duration | 96 months | 84 months (7-year cap) |
| Nominal total | $336,000 | $210,000 |
| Present value at 4% | about $287,000 | about $183,000 |
That's roughly a $104,000 present-value difference from state rules alone. The comparison is illustrative, since a California court could order more or less and a Texas court might not order maintenance at all. Even so, the direction is clear. For a full comparison, see Alimony Duration After a 12-Year Marriage: Why Texas and California Settlements Differ by $400K.
That's also why the residency question raised by the California wealth-tax debate isn't trivial. Where each spouse lives when the case is filed can change the rules that apply. For a longer look at how that works, see Divorce Residency Rules.
The Housing Test: What 7% Does to a $3,500 Check
Now the recipient's side. Suppose the recipient wants to keep the house and refinance a $400,000 mortgage, and the alimony counts toward qualifying income. The payment depends heavily on the rate:
| Rate on a $400,000, 30-year mortgage | Principal and interest per month |
|---|---|
| 3% (a typical older pandemic-era mortgage) | about $1,687 |
| 7% (about where NerdWallet reports rates today) | about $2,661 |
The difference is about $974 a month, or $11,700 a year, before taxes and insurance. At 7%, mortgage principal and interest alone consume about 76% of a $3,500 alimony check. That's without counting property tax, insurance, or maintenance.
Two consequences for negotiation:
- "Keep the house" can look generous on paper and still be unaffordable. If a spouse is waiving alimony or taking a smaller amount to keep the house, model the refinance first.
- Lenders may require documentation that the support will continue, often at least three years. A short alimony term or a lump sum can hurt qualification.
We walk through the mechanics of buying out a spouse in Refinancing the House at 7%+ to Buy Out Your Spouse.
Five Variables That Decide Whether the Offer Is Fair
Before you accept or reject a buyout, plug your own facts into these:
- Your state's duration and cap rules. They set the ceiling on what a court would likely order, and that's your leverage.
- The discount rate. Compare 4%, 6%, and 8%. If the offer only works at 8%, ask why.
- The funding source. A pre-tax 401(k) payment costs the payor much more than the same dollars from cash. Bond-loss harvesting can lower the payor's cost.
- Modification and termination terms. Is the amount modifiable? Does it end on remarriage or cohabitation? A non-modifiable lump sum trades away flexibility for certainty.
- The recipient's housing math. Model the actual mortgage rate the recipient can get, not the rate on the old loan.
Also account for health insurance. If the recipient loses coverage under the payor's plan, replacement premiums or lost ACA subsidies can change the number. Alimony isn't counted as income for ACA purposes post-2018, so eligibility may differ from what you expect. Verify with a benefits professional.
What This Means If You're Sitting on an Offer
Nothing in the news headlines changes your legal rights. But rates above 7%, a bond selloff, and uncertainty about state tax policy all change the practical value of what's on the table. Higher rates make lump sums look smaller and housing look costlier. Bond losses make some funding routes cheaper for the payor. State rules determine how much of this is even negotiable.
Work through the offer using your own numbers before you respond:
- Nominal total of the payments, and the present value at three discount rates.
- After-tax cost to the payor by funding source.
- Recipient's monthly housing cost at today's rate.
- Duration and cap under each state's rules that might apply.
You can model this for your specific situation at Sevaryn, including side-by-side scenarios for a lump sum and monthly payments. Run the comparison before you sign, and bring the results to your attorney and CPA. They handle the legal and tax advice. The math is yours to check.
Sources
- California’s Wealth Tax Explained (And Why It Might Fail) — Tax Foundation
- Mounting bond losses may be a big tax issue for investors this year, but not a bad one — CNBC Personal Finance
- Mortgage Rates Today, Monday, September 28: A Little Lower, But Still Above 7% — NerdWallet
- This Tahoe Hotel Got a Glow-Up, but Missed a Few Spots — NerdWallet
- National Coffee Day: Where to Find Free Coffee and Deals on Sept. 29 — NerdWallet