If your marketplace renewal quote looks much higher than what you were paying, you are not misreading it. The enhanced premium tax credits that applied from 2021 through 2025 lapsed at the end of 2025, and unless Congress restores them, 2026 marks a return to the original ACA subsidy rules: help phases out entirely above 400 percent of the federal poverty line, and the share of income you are expected to contribute is lower for low earners and higher as income rises. The calculator above gives you a rough monthly number before you start plan shopping. Try the defaults: a 35-year-old in California earning $55,000 alone sits at about 377 percent of the poverty line, and because the expected contribution at that income exceeds the estimated $416 full premium, the credit works out to zero and the full premium is the bill. Drop that same person’s income to $30,000 and the picture flips: the expected contribution falls to about $150 a month and the estimated credit covers the remaining $266.
Two inputs move the number most: age and income. ACA rules let insurers charge older adults up to three times what younger adults pay, and the estimate reflects that with age multipliers, from a discount for under-25s up to triple the base premium at 65 and older. Income matters because the credit is not a flat discount; it is the gap between a benchmark premium and a fixed percentage of your income, so a raise, a bonus, or extra freelance work can quietly shrink the help you qualify for. Household size pulls in the other direction: a bigger household raises the poverty-line threshold, which lowers your income as a percentage of it and can increase your credit.
Treat the result as a planning estimate, not a quote. The estimate covers five large states with simplified base premiums, and real marketplace prices vary by county, insurer, and plan. When you are ready for real numbers, healthcare.gov (or your state’s own exchange) shows actual plans and applies the current year’s credit rules to your verified income.
What changed for 2026, and why quotes jumped
From 2021 through 2025, temporary federal law made credits more generous in two ways: nobody paid more than 8.5 percent of income for the benchmark plan, and the 400 percent poverty-line cutoff was suspended, so higher earners could still get partial help. Those enhancements expired at the end of 2025. Barring new legislation, the original rules apply again: no credit at all above 400 percent of the poverty line, and a sliding expected-contribution scale below it. People just over the cutoff feel it most, because losing a partial credit on an age-rated premium can mean hundreds of dollars more per month. If your income hovers near the line, it is worth checking whether a pre-tax contribution such as a traditional IRA or HSA brings your modified adjusted gross income back under the threshold.
How the premium tax credit actually works
The marketplace looks at the second-lowest-cost Silver plan in your area, called the benchmark plan. Based on your household income as a percentage of the federal poverty guidelines, the rules assign an expected contribution, a percentage of income you are expected to pay yourself. Your credit is the benchmark premium minus that contribution, and you can apply it in advance to any metal tier. The calculator mirrors this logic in simplified form, using contribution rates that step up from 2 percent of income at the lowest qualifying incomes to 9.5 percent as you approach the cutoff. That is also why the same plan can cost neighbors very different amounts: the sticker premium is the same, but each household’s expected contribution differs.
Age rating: the three-to-one rule
Federal rules cap how much more insurers can charge for age at three to one, and most states use the full range. In the estimate, a person under 25 pays about 30 percent less than the young-adult base rate, someone 35 to 49 pays about 30 percent more, 50 to 64 pays about 80 percent more, and 65 or older pays triple. Credits soften this for lower incomes, because the expected contribution is based on income rather than age; a 60-year-old and a 28-year-old with the same income owe the same dollar contribution toward the benchmark plan, and the credit absorbs the age difference. Above the credit cutoff there is no cushion, which is why older buyers just past 400 percent of the poverty line see the steepest bills.
Picking a metal tier once you know your credit
Bronze plans carry the lowest premiums and the highest deductibles, covering roughly 60 percent of average costs; Silver covers about 70 percent, Gold 80, and Platinum 90. One quirk worth knowing: if your income is under 250 percent of the poverty line, Silver plans come with cost-sharing reductions that cut deductibles and out-of-pocket maximums, sometimes dramatically, and that benefit only attaches to Silver. At those incomes a Silver plan frequently beats a cheaper Bronze plan on total cost. If you rarely use care and mainly want protection from catastrophe, Bronze plus a funded HSA is a reasonable strategy; if you fill prescriptions monthly or manage a condition, the math usually favors Silver or Gold.