Granting a raise should be a pure goodwill moment, and it still manages to go wrong in writing, numbers that do not match payroll, dates that confuse, warmth that buries the facts. The increment letter has two jobs that must both happen on one page, and this guide builds it: the celebration and the formalisation, with every number payroll needs.
One Letter, Two Jobs
The increment letter does two jobs at once, it celebrates the recognition the increase represents and it formalises the numbers payroll will live by, and letters that do only the first become warm confusion while letters that do only the second waste the moment. Employer letter guidance describes the document as communicate, formalise and celebrate, in one template, and the ordering inside the page matters: the celebration is one sentence; the formalisation is the rest. The opening line carries the congratulations, warm and specific, and the very next line starts the numbers, because the reader's second question after am I valued is always by exactly how much. Letters that spend three paragraphs on appreciation before reaching the figure teach the employee to reread suspiciously, wondering what the warmth is softening.
The Six-Fact Body

The letter carries six facts: the old salary, the new salary, the increase amount or percentage, the effective date, the first payslip that shows it, and any structure change, basic versus allowance, because every missing fact becomes a payroll query in the following month.
- The old salary: your current monthly basic is SGD 4,300.
- The new salary: effective 1 December 2026, your monthly basic becomes SGD 4,640.
- The increase: SGD 340 per month, or 7.9 percent.
- The effective date: 1 December 2026, with the change first reflected in your December payslip, payable on 28 December.
- The structure: the increase applies to basic salary; allowances are unchanged.
- The arithmetic anchor: the annual figure moves from SGD 51,600 to SGD 55,680.
Amounts appear both as figures and in words where policy requires; ambiguity here is a compliance issue. Increment letter formats converge on exactly this fact set, and the payslip line is the one most often forgotten and most often asked about.
The Reason Paragraph
The reason paragraph ties the increase to performance, market adjustment or progression, because an increase without a stated reason reads as a random event, and randomness teaches employees that raises are luck rather than work. Employer guides offer both formal and informal templates, and the difference between them is tone, never the presence of the basis. Name the specific basis: this increase recognises the Hillview account you stabilised in March and the onboarding redesign that cut ramp-up by a third. Generic appreciation, your valuable contributions, dilutes the recognition it is meant to carry, because the employee cannot map it onto anything they did. The reason paragraph is also the company's quiet compensation-policy statement, every increment letter becomes evidence of what gets rewarded here, read sideways by everyone who eventually sees one.
Structure, Bonuses and the Fine Print
The letter states what the increase does not change, bonus bases, benefits, contract terms, and notes any structural split between basic and allowances, because the questions employees do not ask in the happy moment arrive at HR in writing anyway.
- Bonus base: the annual performance bonus continues to calculate on the new basic.
- Benefits: medical, leave and all other terms remain unchanged.
- The structure note: where the increase is split between basic and a fixed allowance, the split and both figures appear.
- CPF contribution bases follow the split in Singapore payroll; accuracy here is not optional.
The unchanged list is reassurance with arithmetic in it. Employees receiving a raise immediately recompute every figure connected to it, bonuses, overtime bases, contribution ceilings, and the letter that pre-answers those recomputations reads as competence rather than paperwork.
Acknowledgement, Not Agreement
The signature line is an acknowledgement of receipt, not an acceptance of terms, because the increment is an employer decision within the contract, and wording it as agreement invites the negotiation the letter is meant to conclude. HR practice on increase letters is settled here: employer-granted increments require acknowledgment, not consent, and the line reads, please sign to acknowledge receipt of this letter. Where the increase changes contractual terms materially, a title change with a new salary structure, for example, a true amendment letter is issued instead, and the two documents do not substitute for each other. The distinction protects both sides: the employee cannot unknowingly accept a changed role by signing a thank-you note, and the company cannot retrofit consent to a decision it made unilaterally.
Compensation Writing as HR English
Increment letters, promotion letters and adjustment notes form the compensation register where precision is generosity, and marked small-group practice keeps that writing both warm and audit-proof. iWorld Learning's Business English small-group classes rehearse exactly this register in classes of three to six, where a marking teacher checks your arithmetic and your tone in the same pass. Keep the issued letter with the payroll file; the next review reads the last reason.
Frequently Asked Questions
Can the increment be backdated?
Yes with both dates stated plainly, the retro period and the arrears line on the next payslip; backdating without explanation invites payroll queries for months.
Should increment letters be marked confidential?
Yes, addressed personally and marked confidential, because salary information is personal data and the marking is a policy signal as much as a legal one.
How do I write a smaller increase than the employee expected?
State the number without apology theatre, name the specific basis and the path to the next review, and offer the conversation; honesty about gaps preserves what vagueness destroys.