APTC (Advance Premium Tax Credit)

The Advance Premium Tax Credit (APTC) is the main federal subsidy that lowers the monthly premium for ACA Marketplace plans. The “advance” part is the key: instead of waiting until tax time, the credit is paid directly to your insurance company each month, so your bill is already reduced when it arrives.

How it is calculated

Three inputs determine your APTC:

• Household size: who you claim on your tax return
• Projected annual income: your MAGI for the coverage year
• Local benchmark plan price: the second-lowest-cost Silver plan in your county

The IRS uses these to determine your “expected contribution” toward premiums on a sliding scale (per IRS Rev. Proc. 2025-25 for 2026 coverage — 2.10% to 9.96% of MAGI as your income rises from 100% to 400% of the federal poverty level). The APTC pays the difference between your expected contribution and the benchmark plan price.

Example

A 38-year-old single adult in Texas with MAGI of $30,000 (about 196% FPL for a household of one in 2026):

• Expected contribution: about 3.5% of $30,000 = ~$1,050/year = ~$87/month
• Benchmark Silver premium in their county: $489/month
• APTC: $489 − $87 = $402/month
• They can apply the $402 to ANY Marketplace plan (Bronze, Silver, Gold). On a cheap Bronze plan that costs $390/month, the APTC fully covers it — they pay $0.

Reconciliation at tax time

The APTC is based on a projection of your income. At tax time you file IRS Form 8962 to reconcile: if you earned more than projected, you may owe some of the credit back; if you earned less, you may get more credit on your refund. Updating the Marketplace mid-year when your income changes keeps the projection accurate and avoids surprises.

APTC vs CSR

• APTC lowers your monthly premium (the bill you pay before using care).
• CSR (Cost-Sharing Reduction) lowers your deductible, copays, and out-of-pocket costs (what you pay when you use care). CSRs only apply to Silver plans.

You can have both at the same time. Many households below 250% FPL who pick a Silver plan get both APTC and CSR — sometimes called “enhanced Silver” benefits.

What changed for 2026

The Inflation Reduction Act’s enhanced subsidies expired December 31, 2025. For 2026 coverage:

• The 400% FPL “subsidy cliff” returned — households above 400% FPL no longer qualify for APTC.
• The applicable-percentage schedule shifted back to 2.10%–9.96% (IRS Rev. Proc. 2025-25).
• Lower-income families still see substantial APTC; the impact is biggest on middle-class households between 250% and 500% FPL.

Related terms

• Premium
• CSR
• Federal Poverty Level
• MAGI

Run the calculator, see your estimated APTC before you talk to an agent.