4-Day Work Week Pay Calculator: Calculate Your Pay Impact

Calculate how switching to a 4-day work week affects your hourly rate, annual salary, and true work-life balance value. Compare full pay, reduced pay, and productivity-based models.

Mathematical Audit

How 4-Day Work Week Pay Is Calculated

There are three common 4-day work week models, each affecting pay differently.

100-80-100 Model: 100% pay, 80% time, 100% productivity (most common in trials)
Compressed 40hrs: Same weekly hours (4×10hr days), same pay — just different schedule
Reduced 32hrs/80% Pay: 80% of salary for 32 hours/week
Effective Hourly Rate = Annual Salary ÷ (Weeks/Year × Hours/Week)

The 100-80-100 model is used by companies like Perpetual Guardian and Microsoft Japan. Research shows 20–40% productivity gains offset the reduced hours.

Operational Guide

How to Use the 4-Day Work Week Calculator

1

Enter your current salary or hourly rate

Your current annual or hourly compensation.

2

Select your 4-day week model

100-80-100 (full pay), compressed 40hrs, or reduced 32hrs at 80% pay.

3

Click Calculate

See effective hourly rate, annual pay change, and work-life balance metrics.

Real-World Scenario Example

"On a $75,000/year salary: 100-80-100 model = $75,000/year but $45.67/hr effective rate (same as before). 80% pay model = $60,000/year. Compressed = same pay, same hours, different days."

Inputs

annualSalary:75000
model:100-80-100

Result

$75,000/year | $45.67/hr effective | 52 extra days off/year

Important Disclaimer

Pay calculations are estimates based on user-entered salary data. Actual pay under a 4-day work week depends on your employer's specific implementation model. This calculator does not constitute employment or legal advice.