21 Jan
As the year closes, HR and accounting teams across the Philippines face one of their biggest annual tasks, preparing and submitting BIR Form 1604-C, or the Annual Information Return of Income Taxes Withheld on Compensation.
This form serves as a summary of all taxes withheld from employees’ salaries throughout the year. It’s submitted to the Bureau of Internal Revenue (BIR) every January 31, along with the Alphalist of Employees, which lists each worker’s total income and corresponding tax withheld.
On paper, it sounds straightforward. It’s one of the most stressful reports HR teams handle.
Why 1604-C Is a Common Headache for HR
Preparing the 1604-C means reconciling twelve months’ worth of payroll data, tax deductions, adjustments, bonuses, separated employees, even late hires.
Here’s what many HR personnel encounter behind the scenes:
- 📂 Scattered data – Payroll details saved across different Excel sheets or email attachments.
- ⏱️ Time crunch – January arrives fast, leaving only a few weeks to double-check every record.
- ⚠️ Error risk – One mismatched TIN, a missing employee record, or incorrect tax computation can cause delays or rejections by the BIR.
- 💬 Manual coordination – HR often chases department heads for updates on resigned staff or unpaid benefits.
It’s a process that demands accuracy and consistency, but manual workflows make that nearly impossible when your team’s already juggling year-end reports, evaluations, and clearances.
Who Is Required to File BIR Form 1604-C?
Not all businesses fully understand if they’re required to file this form—so adding this helps both clarity and SEO.
All employers in the Philippines who have withheld taxes on compensation are required to file BIR Form 1604-C. This includes:
- Corporations (large or small businesses)
- Sole proprietors with employees
- Partnerships
- Government agencies and institutions
Even if you only have a small team, as long as you deduct withholding tax from employee salaries, compliance is mandatory.
Key Deadlines and Filing Requirements
To avoid penalties, companies must strictly follow BIR timelines:
- Deadline of Submission: January 31 of each year
- Coverage Period: January 1 to December 31 (previous year)
- Required Attachments:
- Alphalist of Employees (in prescribed format)
- Summary of compensation and taxes withheld
Late submissions or incomplete attachments can result in penalties, surcharges, and interest charges, which is why early preparation is critical.
Common Mistakes to Avoid When Filing 1604-C
Even experienced HR teams encounter issues during filing. Some of the most common mistakes include:
- Incorrect or missing Tax Identification Numbers (TINs)
- Inconsistent data between monthly (1601-C) and annual (1604-C) filings
- Failure to include resigned employees within the year
- Errors in reporting bonuses, allowances, and taxable benefits
- Incorrect alphalist formatting leading to BIR rejection
These small errors can lead to delays or require resubmission—adding more pressure during an already busy period.
How Automation Changes the Game
This is where technology can completely shift the load. Instead of building the 1604-C from scratch each year, an automated HRIS and Payroll System consolidates everything in real time, payroll runs, deductions, contributions, and employee records.
Decode Technologies’ HRIS and Payroll System was built with exactly this challenge in mind.
With Decode Technologies, HR teams can:
- Automatically generate BIR Form 1604-C and other government reports with accurate, ready-to-file data.
- Sync employee details and tax information in one secure platform, no more multiple spreadsheets.
- Update payroll and contributions automatically in line with the latest BIR, SSS, and PhilHealth regulations.
- Access past payroll records anytime, making year-end reconciliation faster and more reliable.
Getting It Right the First Time
BIR deadlines won’t wait, but your team doesn’t need to scramble every January. By using an integrated payroll solution, you can ensure every peso withheld, every employee record, and every computation aligns perfectly when it’s time to file.
Decode Technologies’ HRIS and Payroll System helps you stay compliant, confident, and in control, all year round.
Simplify Compliance Before the Rush Begins
Don’t wait for the January rush to fix data issues or chase missing files.
Prepare now with a system that’s designed for accuracy, efficiency, and peace of mind.
Book a demo today and Switch to Decode Technologies’ HRIS and Payroll System!, because when compliance is automated, HR teams can finally focus on what matters most: people, not paperwork.
Frequently Ask Questions
What is BIR Form 1604-C?
BIR Form 1604-C is an annual report submitted by employers summarizing all income taxes withheld from employee compensation for the entire year.
When is the deadline for filing BIR Form 1604-C?
The deadline is January 31 of the following year. Late filing may result in penalties and interest charges.
What is the difference between BIR Form 1601-C and 1604-C?
1601-C is filed monthly and reports taxes withheld for that specific month. 1604-C is filed annually and summarizes all monthly filings for the year.
What happens if there are errors in the 1604-C submission?
Errors such as incorrect TINs or mismatched data can lead to rejection by the BIR. Employers may need to amend and resubmit the form, which can delay compliance.
Is the Alphalist required when submitting 1604-C?
Yes, the Alphalist of Employees is a mandatory attachment. It contains detailed employee compensation and tax data.
Can small businesses skip filing 1604-C?
No. As long as a business has employees and withholds taxes from compensation, filing is required regardless of company size.
How can companies simplify 1604-C preparation?
Using an automated HRIS and payroll system helps consolidate data, reduce errors, and generate BIR-ready reports instantly.