Bad-debt deductions: when a write-off qualifies in Hong Kong

For many Hong Kong businesses, the difference between a clean profit-and-loss picture and a noisy one comes down to how uncollectible customer balances are handled. A bad-debt deduction can lower your profits-tax assessment, but only when specific conditions are met. This guide walks through when a write-off qualifies for tax purposes, what the Inland Revenue Department (IRD) generally expects to see, when the deduction is taken, and what happens if the debt is later recovered.

The trade-debt condition in concept

Profits tax in Hong Kong is charged on profits arising in or derived from Hong Kong from a trade, profession, or business. A deduction under the bad-debt rules is generally available only where the debt has the character of a trade debt, not a private or capital debt.

In practice, this means the amount written off should be one that arose in the ordinary course of carrying on your business — typically an unpaid invoice for goods sold or services rendered to a customer on credit terms. Common qualifying scenarios include:

• An invoice for goods delivered on 30- or 60-day terms that the customer has not paid.
• A service fee billed to a corporate client that remains outstanding beyond a reasonable period.
• A loan or advance made in the course of business where repayment is no longer expected.

Loans to shareholders, capital injections, and personal loans made by the business are generally not treated as trade debts and should not be written off against profits.

Evidence the IRD expects

The IRD does not publish a single exhaustive checklist, but its published guidance and the wider framework for deductions under the Inland Revenue Ordinance make clear that a bad-debt claim must be specific, evidenced, and reasonable. From practical experience with assessments, the supporting record typically includes:

• The original sale and the debtor ledger showing when the receivable was raised and how it was treated over time.
• The credit terms agreed with the customer, whether in a sales contract, purchase order, or a clear set of trading terms issued before the transaction.
• A documented collection history, including emails, letters of demand, calls logged, and any formal steps taken before the debt was deemed irrecoverable.
• Evidence that the debt has become bad, which can include insolvency proceedings against the debtor, a formal letter of demand unanswered, the debtor disappearing, or other commercially reasonable grounds for treating recovery as unlikely.
• A written-off entry in the books at the time the debt is treated as bad, and not later.

If your business uses accruals accounting, the deduction is generally claimed in the year the debt is written off in the accounts. There is no separate "approval" step required to write off a debt — the write-off is a bookkeeping event, while deductibility is a tax matter supported by the underlying facts.

Timing of the claim

Hong Kong's profits-tax regime requires profits to be computed on an accruals basis, so the relevant question is when the debt is actually written off in your books — not when it was first overdue.

A few practical points on timing:

• Write off in the same period you recognise the loss. A common pitfall is to leave the receivable on the balance sheet while pursuing the customer, then attempt a write-off in a later year. The deduction should track the period in which your accounts cease to carry the asset as recoverable.
• Don't backdate write-offs. If the IRD reviews the claim, a write-off dated after the period-end will not ordinarily support a deduction in an earlier year.
• Partial write-offs are possible where only part of a balance is considered bad, but the same evidential standard applies to the portion written off.

Recoveries after write-off

Writing off a debt does not extinguish it commercially. If the customer pays — in whole or in part — after you have taken a bad-debt deduction, the recovered amount is generally assessable in the period of recovery. In other words, the earlier deduction is reversed to the extent of the cash received.

From a bookkeeping perspective, the cleanest treatment is:

1. Reinstate the recovered portion of the receivable, or record the cash receipt against a previously written-off debt.
2. Reflect the recovery as gross income in the period it is received, not as a credit against earlier expenses.
3. Keep the original write-off documentation on file, alongside the evidence of recovery, so the cycle is auditable from end to end.

This treatment keeps the deduction and the recovery symmetrical across periods, which is exactly how the IRD expects a bad-debt cycle to reconcile.

Putting the guidance to work

If you operate in Hong Kong and want a clean, defensible bad-debt posture across your entities, the right time to think about it is before a receivable goes cold — not during an IRD review. Build your credit terms, demand letters, and write-off evidence into the same workflow that closes the month-end, and the deduction will follow from the records rather than the other way around.

CompanyForge bookkeep is currently in an invite-only beta. Access is granted through a short waitlist, and accepted teams are onboarded with concierge support from a dedicated specialist who helps configure the books for Hong Kong profits-tax workflows. If you'd like to be considered for the next wave, you can join the waitlist here: <https://companyforge.ai/bookkeep/>.