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📖 Tax Terms Glossary

Confused by all the acronyms? You're not alone!

Here's a simple guide to the most important terms you'll encounter when calculating your real health insurance cost. Bookmark this page - you'll reference it when filing taxes, talking to your CPA, or recalculating throughout the year.

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SEHID - Self-Employed Health Insurance Deduction

What it is: A tax deduction that lets self-employed people subtract health insurance premiums from their taxable income.

Where to claim it: Schedule 1, Line 17 of your Form 1040

Why it matters: Reduces both your taxable income AND your MAGI (which can increase your Premium Tax Credit). This is the "double benefit" most freelancers miss!

💡 Example: You paid $12,000 in health insurance premiums and are in the 22% tax bracket. SEHID saves you $2,640 in federal taxes (plus state taxes). But it also reduces your MAGI, which might increase your PTC by another $1,000+.

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PTC - Premium Tax Credit

What it is: A federal subsidy that helps lower- and middle-income people afford health insurance purchased through the ACA marketplace (Healthcare.gov).

How it's calculated: Based on your household income, household size, location, and the cost of the Second Lowest Cost Silver Plan (SLCSP) in your area.

When you get it: Reconciled when you file taxes using Form 8962. This compares what you received (APTC) vs. what you actually qualified for (PTC).

⚠️ Key fact: You might owe money back if you received too much APTC during the year, or get a refund if you received too little. This catches many freelancers by surprise!

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APTC - Advance Premium Tax Credit

What it is: The Premium Tax Credit paid in advance directly to your insurance company each month (so you pay less upfront).

How it works:

  1. You estimate your income when enrolling on Healthcare.gov
  2. Healthcare.gov calculates your expected PTC
  3. They send payments monthly to your insurer to reduce your premium
  4. At tax time, you reconcile actual vs. estimated on Form 8962

💡 Example: You estimated $50,000 income and received $300/month APTC ($3,600 total). But you actually earned $60,000. When you file taxes, the IRS calculates that you only qualified for $2,000 PTC. Now you owe $1,600 back to the IRS.

✅ Pro tip: Update your income estimate on Healthcare.gov quarterly to avoid owing money at tax time!

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SLCSP - Second Lowest Cost Silver Plan

What it is: The benchmark plan used to calculate your Premium Tax Credit. It's literally the second-cheapest Silver-tier plan available in your area for someone your age.

Why it matters: Your PTC is based on the SLCSP cost, NOT the plan you actually chose. This means:

  • You can pick a cheaper Bronze plan and pocket the difference
  • You can pick a more expensive Gold plan and pay the difference
  • Your subsidy stays the same regardless of which plan you choose

Where to find it: Listed on Form 1095-A (Column B) or viewable on Healthcare.gov when comparing plans.

✅ Fun fact: You can choose a Bronze plan with a $500/month premium, but if the SLCSP is $800/month, your PTC is calculated as if you're paying $800. You keep the extra subsidy!

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MAGI - Modified Adjusted Gross Income

What it is: Your Adjusted Gross Income (AGI) plus certain deductions added back in. Used to determine eligibility for tax credits and subsidies.

How to calculate it:

MAGI = AGI + tax-exempt interest + foreign income + certain deductions (excluding SEHID)

Why it's tricky: SEHID reduces your MAGI, which increases your PTC. But you need to know your PTC to calculate SEHID (since PTC affects your final MAGI). It's a circular calculation that requires iterative solving!

⚠️ This is why most calculators get it wrong: They use a simple formula instead of solving the circular dependency. Our calculator uses the official IRS iterative method to get precise results.

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FPL - Federal Poverty Level

What it is: The minimum income level defined by the federal government, updated annually. Used to determine eligibility for various government programs, including ACA subsidies.

2025 FPL Guidelines:

  • 1 person: $15,060
  • 2 people: $20,440
  • 3 people: $25,820
  • 4 people: $31,200

How it affects you: Premium Tax Credits are calculated as a percentage of income relative to FPL. For example:

  • 138% FPL = Medicaid eligible in expansion states
  • 400% FPL = $60,240 (old subsidy income cap, now removed until Dec 31, 2025)
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Form 8962 - Premium Tax Credit Reconciliation

What it is: The IRS form you file with your taxes to reconcile the APTC you received during the year vs. the PTC you actually qualified for based on your final income.

When to file it: Every year if you received ANY amount of APTC (even $1/month)

What it does:

  • Calculates your actual PTC based on final MAGI
  • Compares it to APTC you received
  • Determines if you owe money back or get a refund

⚠️ Common mistake: Forgetting to file Form 8962 when you received APTC. This can result in penalties, back taxes, and losing eligibility for future subsidies!

✅ Good news: Most tax software (TurboTax, FreeTaxUSA, H&R Block) will automatically prompt you to file Form 8962 if you check the box saying you had marketplace insurance.

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Form 1095-A - Health Insurance Marketplace Statement

What it is: A form you receive from Healthcare.gov that shows your monthly premiums, APTC amounts, and SLCSP costs for the year.

When you get it: By early February (for the previous tax year)

Why you need it: Required to complete Form 8962 for PTC reconciliation. You can't file your taxes without it!

Where to find it:

  • Mailed to your address on file
  • Available in your Healthcare.gov account (Documents section)
  • Emailed if you opted for electronic delivery

✅ Pro tip: Download your Form 1095-A as soon as it's available (usually late January) so you can file taxes early if needed.

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ACA - Affordable Care Act (aka "Obamacare")

What it is: The comprehensive healthcare reform law passed in 2010 that created the Health Insurance Marketplace and Premium Tax Credits.

Key features:

  • Subsidies: Premium Tax Credits for low/middle-income households
  • No denial: Can't be denied coverage for pre-existing conditions
  • Young adults: Can stay on parents' plan until age 26
  • Marketplace: Healthcare.gov to compare and purchase plans
  • Essential benefits: All plans must cover 10 essential health benefits

Why freelancers care: The ACA marketplace is often the only affordable option for self-employed individuals who don't have employer-sponsored insurance.

Enhanced Subsidies (2021-2025)

What they are: Temporary expansion of ACA subsidies passed in the American Rescue Plan Act (2021) and extended through December 31, 2025.

Key changes:

  • Removed 400% FPL income cap: Now anyone can qualify for subsidies (previously capped at ~$60k/year for individuals)
  • Increased subsidy amounts: Higher credits for middle-income earners
  • Lowered premium cap: Maximum contribution reduced to 8.5% of income

⚠️ Status: Set to expire December 31, 2025, unless Congress renews them

Impact if they expire:

  • 9.2 million people could lose coverage
  • Premiums could increase by up to 114% for some households
  • Income cap returns to 400% FPL (~$60,240 for individuals)

Source: KFF.org - November 2024

✅ What to do: Calculate your costs NOW under both scenarios (with and without enhanced subsidies) so you're prepared for 2026 regardless of what Congress decides.

Ready to Calculate Your Real Cost?

Use our calculator to see how these terms apply to YOUR specific situation.