ACA Income-Change & Premium-Tax-Credit Reconciliation Simulator

The forecast helper adds year-to-date MAGI, projected remaining-month amounts and a remaining one-off amount. The revised annual total feeds the contribution calculation for every eligible month. It does not apply the higher income only to months after a raise.

Begin with the applicable monthly amounts rather than treating an annual statement total as a monthly premium. Enrollment premium, benchmark premium and advance credit describe different things. A benchmark is used in the credit calculation; it is not another payment that should be added to your enrollment premium. An advance reduces the amount you paid during coverage, while the credit allowed at filing can be different. Keep a corrected statement available and use the official Marketplace tax tool when a benchmark is missing or incorrect. The calculator cannot reconstruct that benchmark from a plan price or infer eligibility from a premium amount. A month marked ineligible retains its entered advance so reconciliation can still account for it. A month with unknown eligibility remains unresolved. Check the monthly detail and the annual totals together before interpreting the headline.

The 2025 method follows the supported ordinary Form 8962 arithmetic, with the 2024 poverty guideline and form rounding. The 2026 planning method uses 2025 guidelines, the Revenue Procedure 2025-25 percentage bands, an income ceiling above 400%, and full excess-advance repayment. Its continuous figures are planning estimates, not final 2026 form lines.

Keep the selected method visible when comparing results or transferring figures to another worksheet. A demonstration contribution is an editable arithmetic input and does not establish eligibility under either tax year. A 2025 form-style contribution is derived using that year’s supported instructions and rounding, whereas the 2026 method uses continuous planning arithmetic. Two outputs that look similar in cents can therefore have different calculation conventions. The poverty-guideline publication year is also separate from the coverage year, and the residence region changes the applicable household amount. Changing only the year while leaving every other field untouched is a scenario comparison, not evidence that a Marketplace award will stay the same. Verify your household and coverage facts independently, and use the final applicable instructions when preparing a return.

The tool cannot infer the right benchmark from an address or plan name. Check Form 1095-A corrections and the official Marketplace tax tool. A coverage flag is a confirmed input, not the result of an employer-affordability, Medicaid, immigration or premium-payment eligibility assessment.

Use the original estimate only as a comparison against the revised annual figure. Both scenarios keep the same entered monthly coverage, premiums, benchmarks and advances; the comparison does not assume a new insurance quote. The income helper adds permitted components but does not decide whether an item belongs in MAGI. The projection helper also requires a clear distinction between income already earned, remaining monthly income and a remaining one-time amount, so the same receipt is not counted twice. An income-range chart evaluates selected scenarios and policy thresholds rather than assigning probabilities to future earnings. Below-poverty cases outside the supported scope stay unavailable. Review the sampled repayment range, additional credit and premium cost together, and report relevant changes to the Marketplace through its own process rather than treating this worksheet as an application update.

A supported 2025 repayment limitation can leave some excess advances unrepaid. The final modeled cash cost therefore uses actual premiums less actual advances plus repayment, less any additional credit. The calculation trail also shows the simpler gross-premium-minus-credit amount so the distinction is visible.

Keep the during-year cash payment separate from the final reconciliation. Allowed credit and advance credit are comparison amounts, not two contributions to stack on top of the enrollment premium. The cash bridge starts with the enrollment premium and subtracts the actual advance; the filing adjustment then adds repayment or subtracts additional credit. Required household contribution is a separate calculation input and is not necessarily the amount sent to the insurer each month. If an advance exceeds the entered premium, check the statement and correction history instead of assuming the negative cash figure is a benefit you can claim. Annual-method rounding can also make an illustrative monthly sum differ from the governing annual result. Read any disclosed adjustment rather than distributing it invisibly across the monthly rows.

Below-100%-of-poverty cases, married filing separately, shared-policy allocations, marriage alternatives, HRA/QSEHRA coordination, self-employed health-insurance deduction feedback and special eligibility cases need separate work. A blocked result is not a determination that no credit exists. Review the appropriate instructions with a qualified professional for your case.

Use only the facts needed for the supported calculation. Names, account numbers, medical conditions and household member identities are unnecessary. A redacted scenario link omits private amounts and eligibility details, so the recipient must supply missing facts before receiving a tax result. Choose full inclusion only after reviewing the field-level preview, because an encoded link is readable by anyone who receives it. Device saving and file downloads are separate deliberate actions; neither makes the data a verified tax record. Existing saved scenarios should be reviewed for their year, method, household facts and monthly entries before reuse. An imported result is recalculated from its inputs under the available rule pack rather than accepted as proof. Keep final tax documentation and any professional review separate from this local planning worksheet.