Choosing between a 36-hour contract (three 12-hour shifts) and a 48-hour contract (four 12-hour shifts) is one of the most consequential decisions when reviewing travel nurse assignments. While gross weekly packages on 48-hour contracts often appear substantially larger, the actual net financial return per hour worked frequently declines.
Understanding how overtime taxation, federal per diem caps, and higher marginal tax brackets interact helps you evaluate whether working that fourth shift each week is truly worth the physical exhaustion.
Why housing stipends do not increase on a 48-hour contract
A fundamental rule of travel nurse compensation is that non-taxable per diem stipends for housing and meals are capped by federal GSA limits on a weekly basis, not an hourly basis.
Under IRS Publication 463, your lodging and meal expenses reflect the cost of maintaining temporary shelter seven days per week in the assignment city. Whether you work 36 hours across three shifts or 48 hours across four shifts, your weekly lodging cost remains identical.
Because stipends are already maximized at the weekly federal threshold on a 36-hour contract, every additional dollar paid for the fourth 12-hour shift consists entirely of taxable hourly wages and overtime.
You can verify how stipend caps apply to your assignment location using our Per Diem Checker.
The marginal tax bracket climb on overtime earnings
When you move from 36 hours to 48 hours per week, your additional 12 hours of work are taxed at your highest marginal tax bracket, not your average effective rate.
The extra eight hours of regular overtime (hours 41 through 48) incur the 22 or 24 percent federal income tax bracket, plus 7.65 percent FICA taxes, plus state and local income taxes. In high-tax states like California or New York, combined taxes on that fourth shift can exceed 40 percent.
Consequently, while your gross pay increases by hundreds of dollars, your net take-home per hour for that fourth shift is significantly lower than for your first three shifts.
Run both schedules through our Contract Analyzer to see the exact after-tax hourly comparison.
Burnout and illness risk on 48-hour contracts
Working 48 hours of bedside nursing each week elevates the risk of illness or injury. If fatigue causes you to call in sick for one shift on a 48-hour schedule, some agencies attempt to prorate your weekly stipends down to a 36-hour equivalent.
Before committing to a 48-hour schedule, ensure the contract contains clear language protecting your stipends during hospital cancellations.
Evaluate your overall assignment risk profile with our Tax Home Quiz.
Frequently asked questions
Do housing stipends increase when working 48 hours instead of 36?
No. Non-taxable housing and meal stipends are capped by federal weekly GSA guidelines. Pay for hours worked beyond 36 or 40 consists entirely of taxable wages.
Why is my overtime shift taxed at a higher marginal rate?
Earnings from your fourth shift fall into your highest marginal tax bracket, plus 7.65 percent FICA and state taxes, resulting in a lower net hourly return.
Does working 48 hours increase the risk of stipend clawbacks if sick?
Yes. Calling in sick on a 48-hour schedule often triggers larger proportional stipend reductions under agency missed-shift policies.