1095-C Line 15: Reconcile Premium Data to Monthly Reporting

Begin with the reviewed line 14 entry. The 2025 instructions require line 15 only for specified offer codes, including the ordinary 1B, 1C, 1D, 1E, 1J, and 1K codes and specified ICHRA codes. Do not populate an amount for every employee-month simply because a rate is available. Use the complete line 15 code list.

Record applicability as a separate review result: amount required, intentionally blank under the instructions, or unresolved pending the offer-code decision. This prevents a missing value from being confused with a correct blank.

Where an amount applies, retain cents. A zero contribution and a blank are different entries. Ask the preparer to preserve that difference through the import and form-generation process.

For ordinary group coverage, the starting concept is generally the employee share of the monthly cost of the lowest-cost self-only minimum essential coverage providing minimum value that was offered. The actual selected plan or family premium can be different. The IRS employer reporting Q&A discusses that distinction and arrangements that can affect the contribution.

Collect the plan-year rate sheet, eligibility group, effective dates, and any supporting calculation. Identify which source establishes the offered self-only amount. Keep payroll deductions as a comparison source rather than declaring them authoritative for line 15.

If the employer uses flex credits, wellness arrangements, opt-out payments, HRAs, or other relevant adjustments, route the calculation to the responsible reviewer. A simple subtraction from the payroll premium may not reflect the applicable reporting rule.

Use one row per month during analysis, even when a final form can use an all-year entry. Monthly rows expose a rate change that a single annual value can conceal.

Fictional Bay Laurel Works offers Sam a reviewed minimum-value self-only plan option with an applicable monthly line 15 amount of $115 from January through June and $125 from July through December. Sam instead enrolls in a more expensive family option and has a $340 monthly payroll deduction.

The internal annual check is $1,440: $690 + $750. It is not an annual amount to enter in a monthly field. The $340 deduction belongs in the comparison notes, not automatically in line 15. All facts are fictional and assume the reviewer has confirmed applicability and the calculation.

Classify discrepancies as wrong rate version, wrong eligibility group, selected-plan premium substituted for offered cost, unsupported conversion, missing adjustment review, or transformation error. Each category points to a different repair.

When a rate sheet changes midyear, compare its effective date with the first changed month in the prepared output. If an import applied the new value to the whole year, identify all records using that mapping. Preserve the original prepared values so the reviewer can see exactly what changed.

Do not round away cents merely to make totals agree. Also check whether a supposed difference is a comparison of unlike units, such as one payroll period against one calendar month. Have the reviewer approve the conversion method before applying it across the batch.

Finish the reconciliation with a documented reason for each intentional blank, each zero, and every revised amount. Retain the rate source and calculation reference alongside the output version. An approver should be able to reproduce a selected month without opening unrelated employee records.

Review a stable rate, a midyear change, and any arrangement using a distinct calculation. Where a shared formula changes, rerun the affected population and reconcile the resulting differences.

The downloadable worksheet is a monthly bridge, not a calculator for every benefit arrangement. Fill it with verified sources and record the applicable instruction. Its most valuable column is often the explanation of why the prepared amount differs from the employee's actual deduction.