An FDI company depends on two rare line-operation specialists and wants to pay a large retention bonus if they stay three years until the plant’s production stabilises. The board asks: how is this bonus recorded in the contract, must it be repaid on early exit, how is income tax calculated, and what conditions make the arrangement genuinely effective?
Primary sources to check
Retention bonuses have no dedicated regime in the 2019 Labor Code; they are built as a supplementary agreement attached to the labor contract or an accompanying civil agreement, on freedom-of-contract principles and Article 104 on bonuses if structured as an employer bonus. On tax, a cash bonus paid to the worker is employment income subject to personal income tax under the Law on Personal Income Tax 109/2025/QH15, withheld by the company at payment time — whatever it is called, retention bonus or stay support.
What this means for an FDI employer
An effective contract design records four decisions in words. One, the stay milestone: the specific date or event by which the specialist must still be employed for the bonus right to vest — for example the plant’s stable-production milestone or a full 36 months. Two, payment form: a single payment on reaching the milestone is the safest structure for the company; paying instalments in advance makes a clawback mechanism compulsory. Three, forfeiture and clawback conditions: a worker resigning early outside statutory leaving grounds, or dismissed for disciplinary breach, loses the unvested part and repays the received part pro rata to the unserved time. Four, protected cases: unlawful employer termination, position elimination from restructuring, or the specialist losing working capacity — stripping the bonus there is seen as unfair and hard to uphold.
Negotiation practice shows that a clause clawing back the entire bonus on early exit regardless of time already served draws pushback and risks being assessed as a disguised penalty; a clawback decreasing by months served makes the arrangement more balanced and more likely to be honored voluntarily. The company also must not use a retention bonus to substitute minimum-wage or statutory-allowance duties — the bonus is an added layer on top of a complete entitlement base.
Recommended sequence of actions
- Identify the key-specialist group and the stay milestone tied to a dated operating plan.
- Choose the payment structure: prefer payment on vesting; if paying in advance, write a monthly decreasing clawback formula.
- Record forfeiture conditions and protected cases (unlawful employer termination, restructuring cuts, loss of working capacity).
- Tax the bonus as employment income at payment and state this in the agreement so the specialist knows the net amount.
FAQs
How should a retention bonus be written into the contract?
Record it as a standalone retention-bonus agreement or a contract clause with four contents: the subject and the concrete stay milestone; the amount and payment timing; vesting and forfeiture conditions; and the clawback mechanism if prepaid. The more quantified the milestone and money formula, the more enforceable the arrangement.
On early exit, must the bonus be repaid?
Only where the agreement records a clawback mechanism and the money was paid before the stay milestone. The repayable part is reasonably pro-rated to the unserved commitment time, not automatically the whole sum. If the company pays the bonus once at vesting, no clawback question arises.
How is income tax calculated?
A retention bonus is the worker’s employment income, subject to personal income tax at the progressive schedule of the Law on Personal Income Tax 109/2025 and withheld by the company at payment, aggregated into the taxable income of the payment period. It is not an exempt item like statutory allowances.
What conditions make it effective?
Attach four conditions: a measurable stay milestone in time or events; differentiated exit reasons — voluntary early leaving, disciplinary dismissal, employer termination, force majeure; a clawback formula decreasing with time served; and the specialist’s voluntary signature after full explanation. Failing to differentiate exit reasons is the most common design error.