Seasonal Income & ACA Subsidies: A Tech's Field Guide
Every HVAC tech we sit down with asks the same question some version of: 'My income is all over the place — am I even eligible for an ACA subsidy?' The answer is almost always yes. The harder question is how to project income so the monthly premium credit lines up with what you actually earn by December.
How the marketplace looks at your income
The ACA uses Modified Adjusted Gross Income (MAGI) — basically your projected total annual income after standard deductions. The marketplace doesn't care about month-to-month variability. It cares about one number: what you'll earn for the calendar year. Then it reconciles the difference at tax time on Form 8962.
The two ways HVAC techs get this wrong
Over-projecting and under-projecting both have costs:
How to project HVAC income realistically
- Pull your last two years of 1099s or W-2s. Take the average — not the higher one.
- Subtract the months that were genuinely unusual (a multi-week injury, an exceptional install backlog).
- Add expected raises only if you have them in writing.
- If you switched from W-2 to 1099, subtract 25–30% to account for self-employment tax and unreimbursed expenses.
When to update the marketplace mid-year
If your projected income changes by more than $5,000 in either direction — say you landed a fat commercial chiller install in July — log into HealthCare.gov (or your state marketplace) and update it within 30 days. That re-tunes the subsidy and prevents the year-end surprise.
Yes — all wage income counts. Bonuses and overtime are W-2 wages. The marketplace only sees totals, not the timing.
Legally, yes — it's self-employment income. Practically, this is a tax conversation with your CPA, not us.
Income change alone isn't a qualifying event for a new plan, but it does trigger a subsidy recalculation. Plan changes require a SEP-triggering event like marriage, birth, or loss of other coverage.
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