Get your BIR eFPS filings through an API

What you can build on BIR eFPS

• List registered BIR forms

  Build this

  Reads the Form list on the User Menu for one branch code: the tax return forms registered with BIR for your TIN.

  Takes

  Branch code (optional, 000 by default)

  Returns

  TIN, branch code, BIR form numbers and titles

• Look up filed returns for a form

  Build this

  Picks a BIR form on the User Menu, selects File Tax Inquiry and reads the returns it lists for that form.

  Takes

  BIR form number, branch code (optional), period (optional)

  Returns

  BIR form, return period, date filed, amounts and references as the inquiry shows them

• Check the account's user information

  Build this

  Opens Change User Information and reads the e-mail address on file for the eFPS account, without changing anything.

  Takes

  Branch code (optional)

  Returns

  TIN, branch code, e-mail address on file

• File a tax return

  Build this

  Picks a BIR form, selects File Tax Return, fills in the return for the period from your figures and submits it.

  Takes

  BIR form number, branch code, return period, the return's figures

  Returns

  BIR form, return period, date filed, confirmation shown, tax due

Automate BIR eFPS with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

• Monthly returns not yet filed, every branch

  Build this

  Starts

  Every month on the 15th at 9:00, Asia/Manila

  Step 1

  For each branch code you name, list the registered BIR forms and keep the monthly ones, such as 1601-C.

  Step 2

  For each of those forms, look up last month's returns in File Tax Inquiry.

  Step 3

  Keep the forms with no return for that period.

  Step 4

  Email you the list, one section per branch code.

• Newly filed returns, posted to your accounting system

  Build this

  Starts

  Every weekday at 18:00, Asia/Manila

  Step 1

  For each BIR form you name, look up the filed returns in File Tax Inquiry.

  Step 2

  Keep the returns that were not there on the last run.

  Step 3

  Post form, period, date filed and amounts to your accounting webhook.

• Registered forms changed, for the tax team

  Build this

  Starts

  Every Monday at 8:00, Asia/Manila

  Step 1

  For each branch code, list the registered BIR forms.

  Step 2

  Keep the forms added or removed since the last run.

  Step 3

  Email you the changes, so the filing calendar can be updated.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “List registered BIR forms” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "efps.bir.gov.ph/list_registered_forms",
    "input": {
      "branch_code": "000"
    }
  }'

{
  "status": "completed",
  "data": {
    "tin": "123-456-789",
    "branch_code": "000",
    "forms": [
      {
        "form_no": "1601-C",
        "title": "Monthly Remittance Return of Income Taxes Withheld on Compensation"
      }
    ],
    "count": 1
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

BIR eFPS’s own options

eFPS is a web system: from the User Menu you choose a BIR form, then File Tax Return or File Tax Inquiry, and you pay through the eFPS Authorized Agent Bank where you enrolled. BIR's filing guidelines name two other electronic routes: the Offline eBIRForms Package and tax software providers certified by BIR for specific returns. BIR's eFPS pages describe no API for taxpayers.

Read on November 12, 2026: eFPS User Menu help, eFPS Logon help, eFPS Enrollment Form help.

Signing in to BIR eFPS

eFPS asks for your TIN with its branch code, your username and password, then the answer to the challenge question you set at enrollment. The username, password and answer are case-sensitive. With Fous you sign in through eFPS's own sign-in with your own account: the login is sealed with AES-256, never returned by the API or written to logs, and code and AI agents never see it.

Worth knowing

One branch code per sign-in

The TIN field takes the 9-digit TIN and a 3-digit branch code, which defaults to 000 when left blank. Build your methods to take the branch code as an input, and a workflow can loop over your branches.

Up to 3 accounts per corporate TIN

Corporate taxpayers add users with Enroll More Users on the User Menu, up to 3 eFPS accounts per TIN. Each user has its own username, password and challenge question.

Filing and paying are separate steps

eFPS filers pay the tax due through the eFPS Authorized Agent Bank where they are enrolled. A filed return and its payment are two things to check.

When eFPS is down, eBIRForms is the fallback

BIR's guidelines tell eFPS filers to use eBIRForms when eFPS is unavailable under an advisory on the BIR website, or when an enhanced form is not yet in eFPS.

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