Most workers have no idea how per diem really works. Seriously. They just accept whatever their employer hands them and hope for the best. But in Tennessee, the rules around per diem pay and travel reimbursement are more nuanced than most people think.
Whether you travel for work or manage employees who do, this guide is for you. Let’s break it down clearly, step by step.
What Is Per Diem?
Per diem is a Latin phrase. It literally means “per day.” In the workplace, it refers to a daily allowance your employer gives you to cover travel costs. That includes meals, lodging, and small extra expenses like tips and parking.
Think of it like a daily budget for your business trip. Your employer sets an amount. You spend within that amount. Pretty straightforward, right?
Per diem exists to make travel reimbursement simpler. Instead of saving every single receipt, you get a set daily rate. Both you and your employer know exactly what to expect.
Does Tennessee Law Require Per Diem?
Okay, this one surprises a lot of people. Tennessee does NOT require private employers to pay per diem or reimburse travel expenses. There is no state law that forces a private company to cover your meals or hotel stays.
That’s a big deal. States like California require employers to reimburse all necessary business expenses. Tennessee is much more relaxed about this. If you work for a private company in Tennessee, whether you get per diem depends entirely on your employer’s policy or your employment contract.
Here’s where it gets important though. If your employer has a written policy about reimbursing travel expenses, that policy becomes a binding agreement. If they break their own rules, you could have a breach of contract claim. Honestly, this is the part most people miss.
Federal Per Diem Rates Still Matter in Tennessee
Even though Tennessee doesn’t set its own private-sector per diem law, federal rates play a huge role. The U.S. General Services Administration, known as the GSA, sets official per diem rates for every part of the country. These rates are updated every fiscal year.
For federal employees, these rates are mandatory. For private companies, they’re a widely used benchmark. Many Tennessee businesses just adopt GSA rates to keep things simple and IRS-compliant.
The current federal fiscal year runs from October 1, 2025, through September 30, 2026. These are the rates that apply right now.
Tennessee Per Diem Rates for FY 2026
Not all cities in Tennessee are the same when it comes to per diem. The GSA designates certain cities as Non-Standard Areas, or NSAs. These cities have higher rates because the cost of living there is higher.
Nashville gets special attention here. It is classified as an NSA, which means its rates are higher than the standard national rate. For meals and incidental expenses, Nashville’s rate is $86 per day. For lodging, Nashville’s rate reaches $248 per night during peak season in September and October, dropping to $217 per night for all other months.
Memphis has its own designated rate too. Lodging in Memphis sits at $129 per night. The meals and incidentals rate there is $74 per day.
Knoxville also has a specific rate. Lodging runs $119 per night for Knoxville-area travel.
Wondering what happens if you travel somewhere else in Tennessee? Any county not specifically listed by the GSA falls under the standard CONUS rate. For FY 2026, that’s $110 per night for lodging and $68 per day for meals and incidentals. Combined, that’s $178 per day total for most of Tennessee.
First and Last Day of Travel
Hold on, this part is important. The first and last day of your trip are treated differently. You don’t get the full daily rate on those days.
The IRS and GSA only allow 75 percent of the meals and incidentals rate on your first and last travel days. For Nashville, that works out to about $64.50 instead of the full $86. For Memphis and Knoxville, it comes to around $55.50.
This catches a lot of travelers off guard. Make sure your expense reports reflect this rule. It keeps everything clean and compliant.
The IRS Rules You Have to Know
Here’s where things get serious. The tax treatment of per diem depends heavily on how your employer structures the payments. There are two types of reimbursement plans: accountable and non-accountable.
Under an accountable plan, your per diem payments stay tax-free. You don’t pay income tax on that money. Your employer also gets to deduct those costs as a business expense. It’s a win on both sides.
Under a non-accountable plan, the money counts as taxable wages. That means it goes on your W-2. You owe income tax, Social Security tax, and Medicare tax on it. That’s a big difference.
Most people don’t realize how much structure matters here. If your employer pays per diem without proper documentation, you could end up with a surprise tax bill.
What Makes a Plan “Accountable”?
For a per diem plan to qualify as accountable, three things must happen. I looked this up recently. The rules surprised me. They might surprise you too.
First, the expense must have a clear business purpose. Random travel doesn’t count. The trip must be genuinely work-related.
Second, you must submit an expense report. That report needs to list the time, the place, and the business reason for each expense. Vague descriptions won’t cut it.
Third, you must file that expense report within a reasonable time. The IRS generally considers 60 days to be the deadline. If you wait too long, even legitimate expenses can become taxable.
So simple, right? Three steps. But a lot of employees skip the paperwork and end up paying taxes they didn’t need to pay.
What Happens If You Get Paid More Than the GSA Rate?
Stay with me here, because this part matters. If your employer pays you more than the official GSA per diem rate, the extra amount becomes taxable income. The IRS treats the excess as wages.
For example, if the GSA rate for your destination is $86 for meals but your company gives you $120, that extra $34 goes on your W-2 as income. You owe taxes on it.
This is why many companies stick closely to GSA rates. Going over the limit creates extra paperwork and extra tax burdens for everyone.
Per Diem for Tennessee State Employees
Tennessee state government employees follow their own travel reimbursement policies set by state agencies. These rules are separate from the federal GSA system, though they often reference similar benchmarks.
State employees generally must follow their agency’s specific travel policy. Expenses must be submitted through proper channels and within required timeframes. Rules can vary between agencies, so if you’re a state employee, check your agency’s travel guidelines directly.
Per Diem vs. Actual Expense Reimbursement
Not sure what counts as per diem versus regular reimbursement? Let me break it down.
Per diem gives you a flat daily rate. You spend what you spend. If you come in under the limit, you often keep the difference. If you go over, you cover the rest yourself.
Actual expense reimbursement works differently. Your employer pays back exactly what you spent. But you need receipts for everything. The IRS only requires receipts for lodging and for individual expenses over $75 when using per diem, which is one reason many people prefer the per diem method.
Think of per diem like an all-you-can-eat buffet with a set price. Actual reimbursement is like ordering off the menu and paying exactly what you ordered. Both work. Per diem is just simpler.
What Per Diem Does NOT Cover
Per diem is not a free-for-all. It covers meals, lodging, and incidental expenses like tips and small fees. That’s it.
Mileage is not included. If you drive your personal car for business travel, that’s reimbursed separately. The IRS sets a standard mileage rate each year, and most employers use that as their benchmark. For 2025, the IRS rate was 70 cents per mile, and that rate tends to update annually.
Personal expenses are also not covered. A movie on your hotel TV, a bottle of wine at dinner, a gift shop purchase? Those come out of your own pocket. Per diem covers business needs, not personal comforts.
How to Stay Compliant in Tennessee
You’re not alone if this feels like a lot to track. Most people find the paperwork side of per diem confusing. Here’s what you need to do to keep everything in order.
Always document the time, place, and business purpose of every trip. Do this even if your company doesn’t ask for it. Good records protect you if there’s ever a dispute or an audit.
Submit your expense reports on time. Don’t wait 90 days to turn in paperwork from a trip you took in January. That 60-day window is your friend. Use it.
Know your company’s policy before you travel. If your employer has a written per diem policy, read it. If they don’t, ask. A quick conversation before your trip saves a lot of headaches after.
If you’re self-employed and travel for work, note that per diem for self-employed workers only applies to meal costs. You cannot use the lodging per diem rate as a self-employed person. You must use your actual lodging receipts.
When Your Employer Breaks Their Own Policy
Here’s something worth knowing. Let’s say your company has a written travel reimbursement policy. They follow it for everyone except you. Or they change the rules without notice. Or they simply stop paying what they promised.
In Tennessee, a company policy can act as a binding contract. That means you may have legal options if your employer refuses to honor a documented reimbursement agreement. This isn’t guaranteed, and outcomes depend on the specific situation. But it’s worth understanding that “we have a policy” means something legally.
If you believe your employer is violating a written agreement about reimbursement, talking to an employment attorney is a smart move. Many offer free initial consultations.
Frequently Asked Questions
Does Tennessee require employers to pay per diem? No. Tennessee law does not require private employers to reimburse travel expenses or pay per diem. It is entirely based on company policy or your employment contract.
What is the per diem rate for Nashville in 2026? The meals and incidentals rate for Nashville is $86 per day. Lodging rates are $248 per night in September and October and $217 per night for all other months.
Is per diem taxable income in Tennessee? It depends on how it’s structured. Per diem paid under an accountable plan and within GSA rate limits is tax-free. Any amount over the official rate, or paid under a non-accountable plan, counts as taxable wages.
What if I travel to a small town in Tennessee with no listed rate? The standard CONUS rate applies. For FY 2026, that’s $110 for lodging and $68 for meals and incidentals, totaling $178 per day.
Can I keep leftover per diem money? Generally yes, if your employer uses the per diem method and you spend less than the daily allowance. Check your specific company policy to confirm.
Does per diem cover mileage? No. Mileage is reimbursed separately, typically using the IRS standard mileage rate. Per diem only covers lodging, meals, and incidental expenses.
What happens if I miss the 60-day expense report deadline? Late expense reports can turn your non-taxable per diem into taxable income. Submit your reports on time to avoid unexpected taxes.
Final Thoughts
Now you know the basics of how per diem works in Tennessee. Tennessee doesn’t force private employers to pay per diem, but if they do, the IRS rules for keeping it tax-free are clear and manageable.
Know the current GSA rates for your destination. File your expense reports on time. Document your trip’s business purpose. And always read your employer’s travel policy before you hit the road.
When in doubt, ask your HR department or a tax professional. A little preparation before your trip saves a lot of frustration after.
