How to Report USD-Denominated Withholding Tax in Your SAWT DAT File

A SAWT DAT file only accepts Philippine peso amounts, so a USD-denominated income payment and the creditable withholding tax (CWT) withheld from it must be converted before either figure goes into a SAWT row. The conversion isn’t a matter of picking whatever rate is convenient — Revenue Memorandum Circular (RMC) No. 12-2024 requires the Bankers Association of the Philippines (BAP) spot rate on the actual date of the transaction, the same standard already required for RELIEF SLSP.

Why SAWT’s peso requirement doesn’t disappear just because you were paid in dollars #

SAWT (Summary Alphalist of Withholding Tax at Source) is the DAT-format listing a payee files to support a creditable withholding tax credit claimed on an income tax or VAT return, and every field in that DAT layout — income payment, tax withheld — is a peso figure. Getting paid in US dollars by a foreign client’s Philippine branch, a BSP-registered offshore entity, or a PEZA-registered company doesn’t change that: the payee still has to arrive at a peso income amount and a peso CWT amount before either one can go into a SAWT row, because the DAT format itself has no foreign-currency field and the income tax return the SAWT supports is filed in peso.

This is a distinct problem from foreign-currency sales or purchases in a RELIEF SLSP, which is a different DAT file tracking VATable transactions rather than withholding tax credits — see How to Report Foreign Currency Sales and Purchases in Your RELIEF SLSP DAT File for that side. The conversion rule is the same rate standard either way, but the document being converted is different: RELIEF converts an invoice amount, SAWT converts an income payment and the tax a payor already withheld from it under a signed BIR Form 2307 certificate.

The required exchange rate: BAP spot rate on the transaction date #

RMC No. 12-2024 sets the exchange-rate standard for converting a foreign currency-denominated transaction into Philippine peso for internal revenue tax purposes, and it requires the spot rate on the actual transaction date — not a monthly average, and not a rate applied after the fact for convenience. As summarized by tax advisory sources covering the circular:

“The spot rate of exchange on the day of the transaction based on the Banker’s Association of the Philippines (BAP) published rates shall be used.”

If the BAP rate is genuinely impractical for a given currency, RMC No. 12-2024 allows an alternative source (such as the Bangko Sentral ng Pilipinas rate), but only under conditions that include notifying the RDO with jurisdiction over the taxpayer in advance. For a USD-denominated payment specifically, that means: pull the BAP-published rate for the date the income was actually paid or constructively received, apply it to both the gross income figure and the CWT figure on the certificate, and use the resulting peso amounts in the SAWT row — confirm the full circular text and any subsequent amendments on the BIR site before relying on it for a specific filing.

What if the BIR Form 2307 certificate itself was issued in USD? #

A BIR Form 2307 certificate is, by its prescribed format, a peso-denominated document — the withholding agent is expected to compute and remit expanded withholding tax in Philippine currency, so a certificate showing only USD figures is itself off the standard template, not just an inconvenience for the payee’s SAWT. If a payor — commonly a foreign client’s Philippine branch or a BSP-registered entity paying in dollars — issues a 2307 with dollar-only figures, a payee has two practical paths:

1. Ask the withholding agent to reissue or annotate the certificate with the peso equivalent, computed at the BAP spot rate on the date of withholding — the cleanest option, since it keeps the certificate and the payee’s SAWT entry using the same conversion.
2. Convert the certificate’s dollar figures independently using the BAP spot rate for the certificate’s stated withholding date, and keep the original USD certificate plus the conversion working paper on file to substantiate the peso amount reported in SAWT if the BIR questions the credit during an audit.

Either way, the peso amount that ends up in the SAWT row should be traceable back to the certificate and a documented exchange rate — an unsupported peso figure on a claimed CWT credit is exactly the kind of item a BIR examiner will ask about first.

SAWT vs RELIEF: same conversion rate, different filing #

Worked example: an IT consultant paid in USD by a PEZA client #

Ramona Cruz (fictional), an independent IT consultant registered as a self-employed professional, invoices a PEZA-registered BPO client US$3,000 for a completed project. The client pays and withholds 10% expanded withholding tax under the applicable ATC for professional fees, remitting the payment on August 14, 2026. The BAP-published spot rate for that date is ₱56.80 to US$1.

• Gross income: US$3,000 × ₱56.80 = ₱170,400.00
• Creditable withholding tax withheld (10%): US$300 × ₱56.80 = ₱17,040.00

If the client’s BIR Form 2307 already shows these peso figures, Ramona simply carries them into her SAWT row for the client’s TIN and ATC. If the certificate instead shows only “US$3,000 / US$300 withheld,” she applies the same August 14 BAP rate herself, documents the computation, and reports ₱170,400.00 gross income and ₱17,040.00 creditable tax in the SAWT row — the same peso figures either way, because both paths use the same RMC No. 12-2024 conversion standard.

Summary #

A USD-denominated income payment doesn’t exempt a payee from SAWT’s peso-only format — it just adds one required step: converting the gross income and the creditable withholding tax using the BAP spot rate on the actual transaction date, per RMC No. 12-2024, the same standard RELIEF SLSP already applies to foreign currency sales. When the BIR Form 2307 certificate itself arrives in dollars, get it reissued in peso if possible, or convert it yourself and keep the working paper — an unsupported conversion is the first thing an examiner will question on a claimed CWT credit. For the RELIEF-side treatment of foreign currency transactions, see How to Report Foreign Currency Sales and Purchases in Your RELIEF SLSP DAT File, and for SAWT basics, see What Is SAWT? Summary Alphalist of Withholding Tax Explained.