When Can You Deduct Bad Debts From Business Income? BIR Requirements Under Section 34(E) and RR No. 5-99

A bad debt is only deductible from BIR taxable income if it meets the specific requisites in Revenue Regulations (RR) No. 5-99, implementing Section 34(E) of the NIRC — an unpaid invoice does not become a deduction just because a business decides to stop chasing it. Businesses that write off receivables informally, without meeting the documentation and worthlessness requirements, risk having the deduction disallowed on audit even though the underlying loss was real.

What qualifies as a bad debt #

RR No. 5-99 defines a bad debt precisely, and the definition matters because it limits the deduction to receivables genuinely connected to business activity — not any expectation of payment that failed to materialize. The regulation states:

“‘Bad debts’ are defined as debts resulting from the worthlessness or uncollectibility, in whole or in part, of amounts due the taxpayer by others, arising from money lent or from uncollectible amounts of income from goods sold or services rendered.”

This site relied on secondary summaries of RR No. 5-99 for this passage, as the BIR’s own PDF of the regulation could not be reached directly to re-verify the exact wording — confirm the precise text before relying on it for a formal filing position. That definition covers, for example, an unpaid trade receivable from a customer or a business loan the taxpayer extended and cannot collect — not a personal loan unrelated to the business, and not an investment that simply lost value.

The requisites for deductibility #

A bad debt deduction under Section 34(E), as implemented by RR No. 5-99, generally requires all of the following:

1. A valid, legally demandable debt. There must be an existing indebtedness genuinely owed to the taxpayer.
2. A connection to the taxpayer’s trade, business, or profession. Personal or non-business debts do not qualify.
3. The debtor is not a related party. Debts owed by parties related to the taxpayer under the NIRC’s related-party rules are excluded, to prevent artificial write-offs within a controlled group.
4. Actual write-off within the taxable year. The debt must be charged off the taxpayer’s books of accounts as of the end of the year the deduction is claimed.
5. Proof of worthlessness. The taxpayer must be able to show the debt was actually ascertained to be worthless and uncollectible as of year end — not merely difficult or slow to collect.

What documentation the BIR expects #

Because “worthlessness” is a factual determination, not a matter of the taxpayer’s opinion, RR No. 5-99 and BIR practice generally expect supporting paper trail: copies of demand letters sent to the debtor, documentary proof of statements of account issued, and, particularly for larger receivables, evidence the account was referred to legal counsel for collection with a written report on the outcome. A business that simply stops invoicing a non-paying customer and deducts the balance without this trail is exposed to disallowance on examination, even if the debt was, in fact, genuinely uncollectible.

Worked example: writing off an uncollectible receivable #

A supplier extends ₱500,000 in credit terms to a retail customer for inventory. The customer’s business closes and the owner cannot be located after 18 months of collection attempts.

With all five elements documented, the supplier has a defensible ₱500,000 bad debt deduction reducing its taxable income for the year — the deduction rests on the paper trail as much as on the debt actually being unrecoverable.

If the debt is later recovered #

A recovery of a previously written-off and deducted bad debt is generally recognized as taxable income in the year it is recovered, to the extent the earlier write-off produced a tax benefit — the deduction is a timing position on an apparently permanent loss, not an irreversible exclusion if the debtor unexpectedly pays.

Related reading #

Bad debts sit alongside other deductions a business can claim against gross income. See Ordinary and Necessary Business Expense Deduction for the general deductibility framework, and Optional Standard Deduction vs. Itemized Deduction for how itemizing bad debts compares to the OSD alternative, which forgoes itemized deductions like this one entirely.

Frequently Asked Questions #

Can any unpaid customer invoice be deducted as a bad debt? #

No. Under Revenue Regulations No. 5-99 implementing NIRC Section 34(E), a bad debt deduction requires that the debt be valid and legally demandable, connected to the taxpayer’s trade or business, not owed by a related party, actually written off from the books within the taxable year, and shown to be worthless and uncollectible as of the end of that year — an invoice that is merely late or disputed does not automatically qualify.

What counts as a ‘bad debt’ under BIR rules? #

Revenue Regulations No. 5-99 defines bad debts as debts resulting from the worthlessness or uncollectibility, in whole or in part, of amounts due the taxpayer by others, arising from money lent or from uncollectible amounts of income from goods sold or services rendered — in other words, a receivable genuinely arising from the taxpayer’s business activity that has become unrecoverable.

Do I need to file a court case before writing off a bad debt? #

Not necessarily, but the BIR generally expects documentary proof that reasonable collection efforts were made and failed — demand letters, statements of account sent to the debtor, and, for larger amounts, evidence the account was referred to counsel for collection or legal action. Whether formal litigation is required often depends on the size of the debt and the taxpayer’s overall collection practice, which is why supporting documentation matters more than the collection method chosen.

Can a business deduct a bad debt owed by a related party? #

No. RR No. 5-99’s requisites exclude debts owed by parties related to the taxpayer under the related-party rules of the NIRC, precisely to prevent artificial write-offs between affiliated entities or related individuals from generating a tax deduction without an actual economic loss.

What happens if a written-off bad debt is later recovered? #

A recovery of a previously deducted bad debt is generally treated as taxable income in the year it is recovered, to the extent the earlier deduction produced a tax benefit — the write-off is not a permanent exclusion if the debtor later pays after all.

Summary #

A bad debt deduction under Section 34(E) and RR No. 5-99 depends on meeting five specific requisites — validity, business connection, unrelated-party status, actual write-off, and documented worthlessness — not simply on a customer failing to pay. The paper trail proving worthlessness is what turns a real business loss into a defensible tax deduction.