Quick Answer
Per diem pay reimburses daily travel expenses at IRS rates ($79 meals, $98+ lodging in 2026) or company rates. Accountable per diem isn't taxable income and doesn't appear on your W-2, while non-accountable per diem is taxable wages subject to withholding.
Best Answer
Sarah Chen, Payroll Tax Analyst
Employees who travel occasionally for work or are considering jobs with travel
How per diem payments work on your paycheck
Per diem is a daily allowance your employer pays to cover travel expenses like meals and lodging when you're away from home for business. The Latin term literally means "per day," and these payments work very differently from your regular salary or wages.
There are two types of per diem arrangements that affect your paycheck differently:
Accountable per diem plans follow IRS rules and don't count as taxable income. Non-accountable per diem is treated as regular wages and appears on your W-2.
Example: $500 per diem for a 5-day business trip
Let's say you earn $75,000 annually ($2,885 biweekly) and take a 5-day business trip to Denver. Your company pays $100 per day per diem ($500 total).
If your company has an accountable plan:
If your company has a non-accountable plan:
Key factors that determine how per diem works
What happens on your pay stub
Accountable per diem: Appears as a separate line item or separate check. Not included in your gross wages box.
Non-accountable per diem: Added to your regular wages, subject to federal income tax (10-37%), state tax (varies), Social Security (6.2%), and Medicare (1.45%).
What you should do
Ask HR whether your company uses an accountable or non-accountable per diem plan. If it's non-accountable, you can still deduct actual expenses on your tax return if you itemize, but this is more complicated.
Use our paycheck calculator to see how additional per diem wages would affect your take-home pay if your company uses a non-accountable plan.
Key takeaway: Accountable per diem doesn't affect your paycheck taxes and you keep 100% of the allowance, while non-accountable per diem increases your taxable wages and withholding by roughly 30-40%.
*Sources: [IRS Publication 463](https://www.irs.gov/pub/irs-pdf/p463.pdf), [IRS Publication 15](https://www.irs.gov/pub/irs-pdf/p15.pdf)*
Key Takeaway: Accountable per diem doesn't increase your taxable wages, while non-accountable per diem is treated as regular income subject to full withholding.
Comparison of accountable vs non-accountable per diem plans
| Feature | Accountable Plan | Non-Accountable Plan |
|---|---|---|
| Appears on W-2 | No | Yes, as wages |
| Subject to income tax | No | Yes |
| Subject to FICA taxes | No | Yes |
| Expense reporting required | Yes, within 60 days | No |
| Excess amounts | Must return to employer | Keep all payments |
| Tax impact on $500 per diem | $0 | ~$165 withholding |
More Perspectives
Sarah Chen, Payroll Tax Analyst
Workers nearing retirement who may have consulting or part-time travel opportunities
Per diem considerations for pre-retirees
If you're considering consulting work or part-time positions with travel, understanding per diem becomes crucial for retirement planning. Many retirees take on contract work that involves travel, and per diem treatment can significantly impact your tax liability.
Impact on Social Security benefits
Accountable per diem doesn't count as earned income, so it won't affect your Social Security benefits if you're collecting early (ages 62-66). Non-accountable per diem does count as wages and could reduce your Social Security benefits if you exceed the earnings limit ($23,400 in 2026).
Medicare considerations
Per diem wages subject to Medicare tax will increase your lifetime Medicare earnings, potentially affecting future Medicare premiums (IRMAA surcharges). If you're already subject to high-income Medicare surcharges, additional per diem wages could push you into a higher bracket.
Tax planning strategy
For consulting work, negotiate accountable per diem arrangements when possible. This keeps more money in your pocket and provides cleaner tax reporting. If the client insists on non-accountable per diem, factor the additional 30-40% tax burden into your rate negotiations.
Key takeaway: Accountable per diem won't affect Social Security benefit calculations or Medicare premiums, making it preferable for retirement-age workers taking on travel assignments.
Key Takeaway: For pre-retirees, accountable per diem avoids complications with Social Security earnings limits and Medicare premium calculations.
Sarah Chen, Payroll Tax Analyst
Working parents who travel for business and need to understand family budget impact
Per diem impact on family budgets
For working parents, business travel per diem can be a significant budget factor. Understanding how per diem works helps you plan for the extra costs travel creates at home (childcare, takeout meals, etc.).
Childcare and family expense considerations
While per diem covers your travel meals and lodging, it doesn't cover the extra costs at home. If you need additional childcare or your family orders takeout more while you're traveling, these aren't covered by standard per diem. Some companies offer dependent care assistance for business travel, but this is rare.
Tax credit interactions
Non-accountable per diem increases your adjusted gross income (AGI), which could affect income-based tax credits like the Child Tax Credit or Earned Income Tax Credit. For example, if additional per diem wages push your AGI above $150,000 (married filing jointly), your Child Tax Credit begins to phase out.
Budget planning strategy
If your per diem is accountable and you spend less than the allowance, you can use the savings for family expenses. If it's non-accountable, budget for the additional tax withholding and plan accordingly. Many parents find that business travel costs more than per diem covers when factoring in family needs.
Key takeaway: Consider total family costs when evaluating travel positions - per diem may not cover additional childcare and home expenses while you're away.
Key Takeaway: Factor in additional family expenses like childcare when determining if per diem adequately covers your business travel costs.
Sources
- IRS Publication 463 — Travel, Gift, and Car Expenses
- IRS Publication 15 — Employer's Tax Guide
Related Questions
Reviewed by Sarah Chen, Payroll Tax Analyst on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.