BIR Tax Filing Deadlines in the Philippines: What Businesses Must File in October 2026
Summarized answer: Businesses in the Philippines may need to file September withholding tax returns, third-quarter VAT or percentage tax returns, and quarterly withholding returns during October 2026. Important dates include October 12 for non-eFPS Form 1601-C, October 26 for Forms 2550Q and 2551Q, and the October 31 statutory deadline for Form 1601-EQ. Because October 31 falls on a Saturday and November 2 is a holiday, confirm the applicable adjusted deadline with the BIR before filing.
Overview: The October 2026 tax calendar is not identical for every business. Employers, VAT taxpayers, percentage-tax taxpayers, and withholding agents have different obligations. Check your BIR Certificate of Registration, reconcile your books, prepare supporting schedules, and submit returns through the appropriate electronic channel. September is the final month of the third quarter, so Form 0619-E is generally not separately due in October. Loft Spaces supports accounting-related business needs in Metro Manila and Cebu.
October 2026 BIR tax filing calendar
The BIR filing deadlines October 2026 businesses should monitor depend on their registered tax types, filing channel, and accounting period. For most calendar-quarter taxpayers, the following dates are especially relevant:
| Date | BIR form or obligation | Who should check |
| October 5 | Form 2000, documentary stamp tax for applicable September transactions | Taxpayers with covered transactions |
| October 12 | Form 1601-C for September compensation withholding, non-eFPS filers | Employers withholding compensation tax |
| October 15 | Form 1601-C eFPS Group A filing and eFPS payment; annual corporate income tax returns for fiscal years ending June 30 | Covered employers and fiscal-year corporations |
| October 20 | Applicable issuance of Forms 2306 and 2307 for third-quarter withholding | Withholding agents |
| October 26 | Forms 2550Q and 2551Q for the quarter ending September 30 | VAT and applicable percentage-tax taxpayers |
| October 31, statutory | Forms 1601-EQ, 1601-FQ, and other applicable quarterly withholding returns and schedules | Registered withholding agents |
Important: October 31 falls on Saturday. November 2 is a declared special nonworking day, so some professional calendars identify November 3, 2026 as the adjusted filing date for quarterly withholding returns. The BIR’s published reminder identifies October 31 as the statutory date. Verify any official extension or adjustment before relying on November 3.
October 12: Monthly compensation withholding
Employers required to withhold income tax from employee compensation generally report September 2026 withholding through BIR Form 1601-C. For non-eFPS filers, the usual October 10 deadline falls on Saturday, making October 12 the applicable working-day date.
For eFPS filers, filing dates are staggered by taxpayer group, with Group A filing on October 15 and electronic payment deadlines following the BIR schedule.
Before filing, reconcile gross compensation, taxable benefits, employee withholding, and payroll registers.
October 26: Third-quarter VAT and percentage tax
For businesses asking when is BIR Form 2550Q due for Q3 2026, the regular statutory deadline is October 25. Because that day is Sunday, the filing and payment date moves to Monday, October 26, 2026.
VAT-registered taxpayers generally use Form 2550Q for the July–September quarter. They should reconcile sales invoices, output VAT, input VAT, and supporting purchase records. Applicable sales and purchase listings or other attachments must also be checked.
When is BIR Form 2551Q due for Q3 2026? The same October 26 date applies to covered percentage-tax taxpayers.
Confirm whether your enterprise is VAT-registered, subject to percentage tax, or covered by another applicable regime.
October 31: Quarterly withholding tax returns
The third-quarter BIR Form 1601-EQ covers expanded withholding taxes for July through September, together with the required Quarterly Alphalist of Payees when applicable. The published statutory deadline is October 31, 2026, subject to the weekend and holiday adjustment discussed above.
Other relevant quarterly forms include 1601-FQ for final withholding taxes, 1602Q for certain deposit-related withholding, and 1603Q for applicable fringe benefits tax.
A common question is when is the BIR 0619-E deadline in October 2026? Form 0619-E generally applies to the first two months of a quarter. September is the third month, so September expanded withholding is reported through the quarterly Form 1601-EQ instead. Withholding for October ordinarily falls into the following month’s filing cycle.
Is quarterly income tax due in October?
For calendar-year sole proprietors and professionals, third-quarter Form 1701Q is generally due in November, not October. The November 15 statutory date falls on Sunday in 2026, making November 16 the expected adjusted date.
Calendar-year corporations generally file third-quarter Form 1702Q later, ordinarily within 60 days after quarter-end. However, corporations with fiscal years ending June 30 may have annual income tax returns due October 15.
Prepare your accounting records before filing
Good tax compliance begins with reliable bookkeeping. A return prepared from incomplete invoices, unreconciled bank transactions, or inaccurate payroll information can produce incorrect tax calculations.
Before the deadline, review:
- Sales records: Match issued invoices against recorded revenue and customer collections.
- Purchase records: Confirm supplier invoices and the support for claimed deductions or input VAT.
- Payroll records: Reconcile compensation, withholding, and statutory employee information.
- Withholding certificates: Check Forms 2307 and other relevant documentation against ledgers.
- Tax registrations: Compare intended returns with the tax types on your BIR records.
- Payment evidence: Retain filing confirmations, payment references, and acknowledgment receipts.
For businesses with several tax registrations, maintain a separate calendar for each obligation and assign a reviewer who can confirm the amounts, filing acknowledgments, and payment status before closing.
Common mistakes and how to avoid them
A simple prevention process includes:
- Assign ownership: Identify who prepares, reviews, approves, and submits each return.
- Set earlier cutoffs: Finish reconciliations several days before the official deadline.
- Verify schedules: Review the latest BIR calendar for changes, holidays, and filing channels.
- Review calculations: Compare return totals with accounting records and supporting schedules.
- Keep proof: Save electronic confirmations and proof of successful payment.
Late or incorrect filings may result in surcharges, interest, compromise penalties, or other consequences depending on the circumstances and applicable law. If an error occurs, seek professional guidance promptly rather than ignoring the obligation.
How Loft Spaces can help
Startups and growing businesses may not have dedicated accounting teams. Professional support can help maintain organized books, coordinate document preparation, and identify approaching deadlines without distracting founders from daily operations.
Loft Spaces provides business support and accounting-related assistance in Metro Manila and Cebu. Businesses looking for accounting and tax compliance services can discuss their recordkeeping needs, applicable BIR obligations, and the scope of available professional support.
Frequently asked questions
What are the BIR tax filing deadlines in October 2026?
Key dates include October 12 for non-eFPS Form 1601-C, October 26 for quarterly VAT and percentage tax, and October 31 as the statutory date for quarterly withholding returns, subject to adjustments.
Which BIR forms must businesses file in October 2026?
Depending on registration, forms may include 1601-C, 2550Q, 2551Q, 1601-EQ, 1601-FQ, and certain fiscal-year or specialized returns.
When is the deadline for BIR Form 1601-C in October 2026?
For September compensation withholding, non-eFPS filing is due October 12. eFPS filers follow staggered group filing dates and applicable payment schedules.
When is the deadline for BIR Form 0619-E?
There is generally no separate October 0619-E return for September withholding. Third-month withholding belongs in Form 1601-EQ. October withholding is generally reported in November.
When is the deadline for third-quarter VAT filing in 2026?
Form 2550Q for July through September is due October 26, 2026, because October 25 falls on Sunday.
When is BIR Form 2551Q due for the third quarter of 2026?
Covered percentage-tax taxpayers generally file and pay Form 2551Q by October 26, 2026.
When is BIR Form 1601-EQ due?
Its statutory date is October 31, 2026. Because of the weekend and November 2 holiday, verify the adjusted November 3 date against current BIR guidance.
Do businesses need to file quarterly income tax in October 2026?
Usually not for calendar-year third-quarter income tax. Form 1701Q is generally due November 16, while corporate deadlines depend on the fiscal year.
What happens if a business misses a BIR filing deadline?
Penalties and interest may apply. Determine the correct filing, settle outstanding obligations, and consult a qualified tax adviser regarding applicable relief or corrections.
Can businesses file BIR tax returns online?
Yes. Eligible taxpayers use BIR electronic filing facilities, including eBIRForms or eFPS, subject to applicable registration and payment requirements.
Stay ahead of the next deadline
The best response to a busy tax calendar is preparation. Keep accurate records, check your registered tax types, and verify deadline changes directly with the BIR.
If you’re looking for a face-to-face consultation or prefer an online meeting, we’d be happy to assist you with accounting, bookkeeping, BIR tax filing, tax compliance, and other business support services. Contact Loft Spaces to discuss your needs in Metro Manila or Cebu.