Why your Gold plan might cost less than Silver

If you take one thing from this site, take this: comparing marketplace plans by monthly premium gives you the wrong answer. Not slightly wrong. Frequently backwards. A Gold plan that lists at $46 more per month than a Silver plan can end up costing you less every single month once the premium tax credit lands, while covering considerably more of your medical bills.

The mechanic behind that is called silver loading, and almost nobody explains it because explaining it requires explaining three things at once.

The credit is welded to one specific plan

Your premium tax credit is not a percentage discount. It is a fixed dollar amount, and it is calculated from a single reference plan: the second-lowest-cost Silver plan available in your area, age-rated for your household. That plan is called the benchmark.

The formula is short. Take the benchmark premium. Subtract the amount an IRS schedule says you should contribute out of your own income. Whatever is left over is your credit.

Credit = benchmark Silver premium, minus your expected contribution

Notice what is missing from that formula: the plan you actually buy. The credit is computed before you choose anything. Once it is set, you can spend it on any metal tier you like, and the dollar amount does not move.

That is the whole trick. If you take your credit to a plan cheaper than the benchmark, you keep the entire credit and pay the small remainder. If you take it to a more expensive plan, you pay the difference out of pocket.

Why Silver premiums got inflated on purpose

Now the second piece. Cost-sharing reductions are extra help with deductibles and copays for people under 250% of the federal poverty level. Congress required insurers to offer them. The federal government used to reimburse insurers for the cost, and in 2017 those reimbursement payments stopped.

The obligation did not stop. Insurers still had to provide the reduced-cost-sharing plans, they simply were not being paid for them any more. So state regulators, in most states, allowed insurers to recover that cost by raising premiums. And because cost-sharing reductions attach to Silver plans and only to Silver plans, insurers loaded the entire cost onto Silver premiums specifically.

Hence the name. Silver got loaded. Bronze, Gold and Platinum did not.

Put the two together

Silver premiums went up. The benchmark is a Silver plan. So the benchmark went up. And because the credit is benchmark minus your contribution, everyone's credit went up too, by roughly the amount of the loading.

Meanwhile Gold premiums stayed roughly where they were. So you now have a larger credit chasing a Gold plan whose price did not move. In a lot of counties, that arithmetic lands Gold below Silver on net price.

Worked example, using illustrative demo figures for a 40 year old at 280% of the federal poverty level:

• Benchmark Silver: $540 a month, expected contribution $387, so the credit is $153
• Buy that Silver plan: you pay $387 a month with a $4,800 deductible
• Buy the Gold plan at $572 list: you pay $419 a month with a $1,600 deductible
• But the second Gold plan lists at $521: you pay $368, less than Silver, with a $1,600 deductible

Nineteen dollars a month cheaper, and $3,200 less deductible exposure. Sorting by premium hides that plan entirely, because on the list it looks $19 more expensive than the Silver plan sitting above it.

The one case where this reverses

All of the above assumes you are not eligible for cost-sharing reductions. If you are under 250% of the poverty level, the loaded Silver plan is not really a Silver plan any more. It is a Silver plan wearing a much better plan underneath.

Under 150% of the poverty level, a Silver plan behaves like a 94% actuarial value plan. That is richer than Platinum, and you pay the Silver premium for it. In that band, Gold is almost never the right answer and Bronze is close to a mistake.

So the rule has two halves, and both matter:

1. Under 250% of the poverty level: look hard at Silver first. The cost-sharing reduction is worth more than almost any premium saving.
2. Over 250%: compare Gold against Silver on net price. In many counties Gold wins outright.

What to do about it

Run the estimate, get your credit as a dollar figure, then subtract that same figure from every plan on the list. Sort by what is left. It takes two minutes and it routinely finds people a better plan for less money, which is a rare enough combination that it is worth the two minutes.