Guides Your plan or your spouse's
Your plan or your spouse's? How to compare two employers' health plans
When you both have health coverage through work, you have more choices than it first seems, and the cheapest one often isn't the obvious one.
The ways you can enroll
- Everyone on one plan, yours or your spouse's, at the family coverage level.
- Each of you on your own plan, with the children on whichever plan costs less for them.
- One of you on your own plan, and the rest of the family on the other.
Each employer usually offers more than one plan, so with two employers there can be a dozen or more combinations. A child can be on either parent's plan, as long as that parent is enrolled in it too.
How to compare them
For every combination, add up the premiums for each plan at the coverage level it needs (employee only, plus spouse, plus children, or family), each plan's share of the care for the people on it, and any extra charges, then subtract any HSA money and opt-out pay. Do it for a normal year and for a bad year.
Splitting the family has a trade-off: two plans mean two deductibles and two out-of-pocket maximums. Lower premiums can more than make up for it in a normal year, but a bad year can cost more.
Employer rules that change the math
Spousal surcharges
Some employers charge extra to cover a spouse who could get coverage through their own job, often a set amount a month or a paycheck. A $100-a-month surcharge adds $1,200 a year to every option that puts that spouse on that plan.
Working-spouse rules
Some employers don't let a spouse join at all if the spouse can get coverage through their own job. Some go further and exclude a spouse with any other coverage they could get, such as a retiree plan, Medicare or military coverage, and a few don't cover spouses at all. Read your benefit guide's eligibility section for the exact wording.
Pay for turning a plan down
Some employers pay you to decline their medical coverage when you're covered elsewhere, usually added to your paycheck and taxed as pay. That money counts in favor of every option where you're on your spouse's plan.
The HSA catch for couples
If either of you has a general health FSA through work, neither of you can put money into an HSA, even on an HSA-eligible plan. And on family HSA coverage, the yearly limit ($9,000 for 2027) is shared between you, not doubled.
A worked example
Made-up numbers for a family of four. Alex's employer charges a $1,200-a-year spouse surcharge. Sam's employer pays $600 a year to employees who turn its coverage down. The care costs are each option's share of the same year of claims.
| Option | Premiums | Surcharge or opt-out pay | Your share of care | Total |
|---|---|---|---|---|
| Everyone on Alex's plan | $6,000 | +$1,200 surcharge, −$600 opt-out pay | $3,000 | $9,600 |
| Everyone on Sam's plan | $7,800 | $0 | $2,600 | $10,400 |
| Alex and the children on Alex's plan, Sam on Sam's | $5,700 | $0 | $3,600 | $9,300 |
Splitting costs least here even though it means two deductibles, and putting everyone on Alex's plan only comes close because of Sam's opt-out pay. Change one number, like the surcharge or the opt-out pay, and the order can flip, which is why it's worth running every combination.
Do it with your own numbers
HerePup tries every way your household can enroll across both employers, including splitting the family, and counts spouse surcharges, working-spouse rules and opt-out pay, which it reads from your benefit guides along with each plan.
Free. Your benefit guides and claims are read on your device and never uploaded.
Questions people ask
Is it cheaper for spouses to be on separate health plans?
Sometimes. Two employee-only premiums can cost less than one family premium, especially when one employer charges a lot to add a spouse. But two plans also mean two deductibles and two out-of-pocket maximums, so compare a bad year as well as a normal one.
What is a spousal surcharge?
An extra charge some employers add to your premium when you cover a spouse who could get health coverage through their own job. It's often a set amount each month or each paycheck. Your benefit guide will say when it applies.
What is a working spouse rule?
A rule that keeps a spouse off an employer's plan when the spouse can get coverage through their own job. Some employers go further and exclude a spouse with any other coverage they could get, and a few don't cover spouses at all.
Can my children be on my spouse's plan if I'm on my own?
Usually yes, as long as your spouse is enrolled in that plan too. Children can't be on a plan without the employee whose job offers it.