How it works
Approximate take-home reduction = gross sacrifice × (1−marginal income-tax saving−employee social-contribution saving).
Input definitions
- Gross salary sacrificed per period
- Enter the value in the labeled unit.
- Confirmed marginal income tax (%)
- Enter the value in the labeled unit.
- Confirmed employee social contribution saving (%)
- Enter the value in the labeled unit.
A worked example
- Gross salary sacrificed per period
- 500
- Confirmed marginal income tax (%)
- 20
- Confirmed employee social contribution saving (%)
- 8
Assumptions & limits
Sources checked 18 October 2026. Manual marginal scenario for UK or other eligible schemes with confirmed rates. Does not test scheme eligibility or statutory pay requirements.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-18. Content checked against the stated method and examples. Our verification approach.
Common questions
Is this a full UK salary-after-sacrifice payroll calculation?
No. Use verified marginal rates for the relevant period. Tax-band crossings, allowance tapers, minimum-wage rules, benefit impacts and employer sharing are excluded.
How does Salary sacrifice marginal net cost work?
Approximate take-home reduction = gross sacrifice × (1−marginal income-tax saving−employee social-contribution saving).
What should I check before using Salary sacrifice marginal net cost?
Sources checked 18 October 2026. Manual marginal scenario for UK or other eligible schemes with confirmed rates. Does not test scheme eligibility or statutory pay requirements.