Buying and Selling Annual Leave: How the Salary and Tax Maths Actually Works in 2026
Some employers let staff buy extra annual leave (or sell unused days) through a salary adjustment scheme. Here's exactly how the pay, tax and pension implications work out, using real 2026/27 rates.
How "Buying" Extra Annual Leave Actually Works
Holiday trading schemes let employees purchase additional annual leave days beyond their standard contractual allowance, usually up to a capped number of extra days per year (commonly 5 days is a typical cap, though this varies by employer). In exchange, your pay for the scheme year is reduced by an amount reflecting the value of the days purchased.
Basic calculation:
| Step | Example |
|---|---|
| Annual salary | £36,000 |
| Working days per year (approx, after weekends/bank holidays) | ~253 days |
| Daily rate (£36,000 ÷ 253) | ~£142/day |
| Buying 3 extra days | ~£426 total deduction, spread across pay periods |
The precise daily rate calculation method varies by employer scheme — some use a simplified calendar-based formula, others a more precise working-days calculation — so always check your specific scheme's stated methodology rather than assuming a generic formula applies exactly.
Is It a Genuine Salary Sacrifice, or Just Relabelled Unpaid Leave?
This distinction matters a lot for the actual tax outcome, and isn't always obvious from how the scheme is marketed internally:
| Scheme Structure | Tax Treatment |
|---|---|
| Genuine salary sacrifice (contractual salary reduction, agreed in advance) | Reduces taxable salary before tax/NI calculation — you save income tax and National Insurance on the sacrificed amount |
| Simple pay deduction / unpaid leave relabelled as "buying" days | No special tax advantage — you're taxed as normal on your full salary, then simply receive less net pay because gross pay itself was reduced, with no additional tax saving beyond what you'd get from earning less in the first place |
Worked comparison (buying 3 days, £426 gross value, higher rate taxpayer):
| Genuine Salary Sacrifice | Simple Pay Deduction | |
|---|---|---|
| Reduction in gross taxable salary | £426 | £426 |
| Income tax saved (40%) | £170.40 | £170.40 (this happens automatically either way, since less salary means less tax, regardless of scheme structure) |
| National Insurance saved (2% for higher earners on this portion, assuming above UEL, or 8% if within the main NI band) | Varies by income level and NI band | Same — NI is calculated on actual salary paid regardless of the scheme's label |
In practice, because both structures ultimately reduce your actual taxable salary, the tax and NI outcome is often very similar between a "genuine salary sacrifice" scheme and a "simple deduction" scheme — the meaningful difference tends to show up more in pension contribution calculations and other salary-linked benefits, described below, rather than in the income tax/NI treatment itself.
Pension Contribution Impact
This is the detail most likely to catch employees out. If pension contributions (yours and your employer's) are calculated as a percentage of your salary, and your scheme structures the leave purchase as an actual reduction to your pensionable salary, your pension contributions for that period could be lower than they would otherwise have been.
| Scenario | Pension Impact |
|---|---|
| Scheme reduces pensionable salary | Both employee and employer pension contributions calculated on the lower salary — smaller pension contribution for that period |
| Scheme structured to preserve pensionable salary at pre-purchase level | No reduction to pension contributions, despite the reduced take-home pay |
Check your specific scheme's documentation, or ask HR/payroll directly, whether pension contributions are calculated on your salary before or after the leave purchase deduction — this detail is genuinely not always obvious from a scheme's headline description, and it's worth confirming explicitly rather than assuming.
Selling Back Unused Leave
Some employers allow the reverse arrangement: selling back unused leave (above the statutory minimum) for extra pay, typically processed as additional salary through PAYE in the relevant pay period, taxed at your normal marginal rate alongside your usual income.
| Leave Category | Can It Be Sold Back? |
|---|---|
| Statutory minimum (28 days including bank holidays, pro-rata for part-time, for most full-time workers) | Generally no — statutory minimum leave must be taken, not paid in lieu, except on termination of employment |
| Contractual leave above the statutory minimum | Sometimes tradeable, depending on employer scheme rules |
Deciding Whether to Buy Extra Days
Since the tax and pension mechanics vary by employer scheme, the most useful practical step is asking your HR or payroll team directly:
- What is the exact daily rate deduction for buying a day, based on my specific salary?
- Is this structured as a genuine salary sacrifice, and does it affect my pensionable salary?
- Is there a cap on how many extra days I can buy, and a deadline for electing into the scheme each year?
- If I later leave the company, how are any unused purchased days (or an incomplete deduction) settled?
With those specifics confirmed, you can work out a genuine "cost per extra day off" figure for your own salary and weigh it directly against how much you personally value the additional time away from work.
Frequently asked questions
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