Second Job Tax Calculator
See how much of your second job you keep
Enter your main job and second job pay to see how much of your second job you keep after Income Tax and National Insurance.
Your main employment gross pay before tax.
Common main salaries:
Gross pay from your second employment before tax.
Common second-job amounts:
Your estimated results
Second job gross £833.33/mo · You actually keep £666.67/mo · You keep 80.0%
Estimate of annual liability. Personal Allowance is assumed against the main job first. Second-job payslips often use codes such as BR or D0 depending on circumstances — that affects timing of PAYE, not a special second-job tax rate. Employee NI is assessed separately for each employment.
Breakdown
Second job
Combined
Key points
£12,570
Personal Allowance (once)
£12,570
NI threshold per job
BR / D0
Common second-job codes
About the Second Job Tax Calculator
Use this second job tax calculator to estimate how much of your second-job income you keep after Income Tax and employee National Insurance for the 2026/27 tax year.
Enter your main job salary and second job income. The calculator works out the Income Tax attributable to the second job from your combined annual income, and National Insurance on each employment separately.
A second job is not taxed at a special "second job rate". Income Tax depends on total income and one Personal Allowance. Second-job payslips often use codes such as BR or D0 because the allowance usually sits on the main job first.
Results are an annual liability estimate. Actual PAYE deductions can differ during the year because of tax codes and payroll timing.