ClockIN← All BIR guides
Guide · updated 1 Nov 2026

1604-C and alphalist, without retyping payroll.

The numbers already exist in your pay runs. Use them.

The 1604-C and its alphalist are due by 31 January for the year before. Most of the work is not tax; it is moving the same payroll numbers into another list, one person at a time.

Where each figure comes from

On the alphalistComes from
Gross payEvery closed pay run of the year, added per person
13th month and other benefitsThe 13th month, and bonuses; tax-free up to the ceiling (₱90,000 with other benefits), the rest taxable
De minimisRice and clothing allowances, up to their limits
SSS, PhilHealth, Pag-IBIGWhat was taken from each payslip
Taxable pay and tax dueWorked out from the BIR table
Tax withheldWhat was actually taken, month by month

Schedule 1 and Schedule 2

Employees at the minimum wage go on their own schedule, with their basic pay, holiday pay, overtime and night differential shown separately. Everybody else is on Schedule 1. ClockIN splits them for you from each person’s rate.

Before you file: four checks

  1. Every pay period of the year is closed. Open periods make the forms drafts.
  2. Everybody has a TIN. The page lists the people without one.
  3. Tax withheld equals the twelve monthly 1601-C totals. The BIR compares these two, so find any gap first.
  4. Nobody is paid and missing. Deductions recorded for somebody with no pay are listed, not hidden.
In ClockIN. Open File BIR, then 1604-C and 2316, and pick the year. It shows what to fix, and gives you the alphalist Excel, the 2316 for everyone, and the 1601-C figures. The Excel has every column your accountant keys into the BIR’s Alphalist Data Entry module.

The BIR’s alphalist DAT layout is not written by ClockIN yet; it will be once a file has passed the BIR’s validator.

Questions

Does this include freelancers?

No. A freelancer paid as a supplier has tax withheld on a 2307, not on a payslip, so they stay off the 1601-C, the alphalist and the 2316.

When is it due?

The 1604-C and alphalist for a year are due by 31 January of the next year. Confirm against the BIR’s current calendar.

Skip the hard part

Photograph the papers. ClockIN checks every line and makes the files.

Made by ClockIN, by Strong Media Corp, Metro Manila. ClockIN is not BIR-accredited. Test every file in the BIR’s own validation module before you submit it; the filing stays with you and your accountant. Rules and rates change, so confirm against the BIR’s current issuances.