Guide
Four-Day Week Salary After Tax
Estimate the take-home effect of moving from full-time to four days a week.
Plain-English answer
Helpful before using the calculator
Updated 2026-07-11
What this page helps you answer
What this pay, tax or salary topic means in simple terms.
What number or setting to check next in the calculator.
Confirm whether pay is pro-rated
Some four-day arrangements keep full pay, while others reduce salary to match hours.
Model annual income
Use the old salary and new pro-rated salary to compare take-home pay.
Include non-cash value
Time, commute savings, childcare and wellbeing can change the real value of the decision.
Common questions
Is a four-day week always a 20% pay cut?
No. It depends on the arrangement.
Does tax make the cut smaller after tax?
Often yes, because lower income can reduce tax and repayments.