A premium is the amount you pay, usually monthly, to keep an insurance policy active, whether or not you ever file a claim.
Premium is the "subscription" part of insurance. You pay it for the protection, the way you'd pay for a gym membership you hope you never need the emergency exit of. What it buys is the insurer's promise to pay its share when something covered happens. Your deductible and co-pay are the other costs, the ones you pay when you actually use the coverage.
People often find this confusing because the same word covers very different bills. Health, car, home and Medicare premiums all have their own rules. What they share is that you owe them to keep coverage in force.
What a premium is
HealthCare.gov defines a premium as the amount you pay for your health insurance every month. In addition to it, you usually pay other costs for care, including a deductible, copayments and coinsurance. Its own advice is worth repeating: the plan with the lowest monthly premium may not be the best match, because a plan with a slightly higher premium but a lower deductible may save you a lot of money if you need much care.
Premiums don't count toward your out-of-pocket limit. HealthCare.gov lists monthly premiums among the things that limit doesn't include, along with services your plan doesn't cover and out-of-network care.
For auto insurance, NAIC says premiums change with the level of risk the insurer expects. Taking on more risk, such as dropping optional coverages or raising your deductible, can lower the premium. For homeowners policies, NAIC says a higher deductible reduces the price too.
What it looks like
Premiums look different depending on the kind of coverage. The details below come from the official pages named in the last column.
| Coverage | How the premium works | Source |
|---|---|---|
| Marketplace health plan | Monthly amount you pay whether or not you get services; you may qualify for a premium tax credit; first payment goes to the insurer, not the Marketplace | HealthCare.gov |
| Medicare Part A | $0 for most people in 2026, because they or a spouse paid Medicare taxes long enough, generally at least 10 years | Medicare.gov |
| Medicare Part B | $202.90 a month in 2026, or higher depending on income; paid even if you use no services | Medicare.gov |
| Medicare Advantage (Part C) | Varies by plan; you must keep paying your Part B premium | Medicare.gov |
| Car insurance | Based on rating factors such as location, driving record, vehicle, miles driven, coverages and deductible | NAIC |
| Homeowners | Affected by home value, construction, age, fire protection, coverage amount, deductible and discounts | NAIC |
Medicare amounts change each year, and the 2026 figures above will go stale. Read the current number on Medicare.gov. Late enrollment can also add a penalty to a Part B premium, so timing matters.
What to keep and for how long
Nobody publishes a single keep-period for premium paperwork, so think in terms of what you might need to prove.
- The policy or plan documents for as long as the coverage is active, plus the renewal notice that shows next year's premium. Replace them with the new version at each renewal.
- Proof of payment, such as a bank record or insurer receipt, until the policy period closes. If a payment ever gets disputed or a policy lapses, this is your evidence.
- Premium and billing notices for the term they cover. Your insurer's bill and a bank statement line should agree.
- Employer or Medicare paperwork showing what was taken out of your pay or benefits, with your other tax records for the year. Tax treatment varies, so check IRS guidance or ask a tax professional.
- Proof of insurance for any car or home you own, while the policy runs. NAIC notes that most mortgage lenders require homeowners coverage, and if it lapses the lender will likely insure the home itself, at a premium that might be much higher.
If you want these in one place, storing insurance documents on your phone explains a simple setup. Paperlock can also read the amount and dates off a photographed bill. For longer-term timelines, see what documents to keep and for how long.