Recordkeeping — How To Prove Expenses: Business Travel and Vehicle Expenses (2025 IRS Guide)

This guide covers “Recordkeeping — How To Prove Expenses” within business travel and vehicle expenses. The following material presents the IRS treatment of this topic, including the qualifications, exceptions, and examples in the source section. Read the rules alongside the facts of your own situation before deciding what to report, deduct, or document.

Adapted from Publication 463 (2025), Travel, Gift, and Car Expenses, published by the Internal Revenue Service. This guide retains the source edition’s years, amounts, deadlines, and examples. It is guidance for that edition, not a statement that the same figures apply to every tax year.

Context for these rules

If you deduct travel, gift, or transportation expenses, you must be able to prove (substantiate) certain elements of expense. This chapter discusses the records you need to keep to prove these expenses.

If you keep timely and accurate records, you will have support to show the IRS if your tax return is ever examined. You will also have proof of expenses that your employer may require if you are reimbursed under an accountable plan. These plans are discussed in chapter 6 under Reimbursements.

Recordkeeping — How To Prove Expenses

Table 5-1 is a summary of records you need to prove each expense discussed in this publication. You must be able to prove the elements listed across the top portion of the chart. You prove them by having the information and receipts (where needed) for the expenses listed in the first column.

Note:

You can’t deduct amounts that you approximate or estimate.

You should keep adequate records to prove your expenses or have sufficient evidence that will support your own statement. You must generally prepare a written record for it to be considered adequate. This is because written evidence is more reliable than oral evidence alone. However, if you prepare a record on a computer, it is considered an adequate record.

What Are Adequate Records?

You should keep the proof you need in an account book, diary, log, statement of expense, trip sheets, or similar record. You should also keep documentary evidence that, together with your record, will support each element of an expense.

Documentary evidence.

You must generally have documentary evidence such as receipts, canceled checks, or bills, to support your expenses.

Exception.

Documentary evidence isn’t needed if any of the following conditions apply.

• You have meals or lodging expenses while traveling away from home for which you account to your employer under an accountable plan, and you use a per diem allowance method that includes meals and/or lodging. (Accountable plans and per diem allowances are discussed in chapter 6.)

• Your expense, other than lodging, is less than $75.

• You have a transportation expense for which a receipt isn’t readily available.

Adequate evidence.

Documentary evidence will ordinarily be considered adequate if it shows the amount, date, place, and essential character of the expense.

For example, a hotel receipt is enough to support expenses for business travel if it has all of the following information.

• The name and location of the hotel.

• The dates you stayed there.

• Separate amounts for charges such as lodging, meals, and telephone calls.

A restaurant receipt is enough to prove an expense for a business meal if it has all of the following information.

• The name and location of the restaurant.

• The number of people served.

• The date and amount of the expense.

If a charge is made for items other than food and beverages, the receipt must show that this is the case.

Canceled check.

A canceled check, together with a bill from the payee, ordinarily establishes the cost. However, a canceled check by itself doesn’t prove a business expense without other evidence to show that it was for a business purpose.

Duplicate information.

You don’t have to record information in your account book or other record that duplicates information shown on a receipt as long as your records and receipts complement each other in an orderly manner.

You don’t have to record amounts your employer pays directly for any ticket or other travel item. However, if you charge these items to your employer, through a credit card or otherwise, you must keep a record of the amounts you spend.

Timely kept records.

You should record the elements of an expense or of a business use at or near the time of the expense or use and support it with sufficient documentary evidence. A timely kept record has more value than a statement prepared later when there is generally a lack of accurate recall.

You don’t need to write down the elements of every expense on the day of the expense. If you maintain a log on a weekly basis that accounts for use during the week, the log is considered a timely kept record.

If you give your employer, client, or customer an expense account statement, it can also be considered a timely kept record. This is true if you copy it from your account book, diary, log, statement of expense, trip sheets, or similar record.

Proving business purpose.

You must generally provide a written statement of the business purpose of an expense. However, the degree of proof varies according to the circumstances in each case. If the business purpose of an expense is clear from the surrounding circumstances, then you don’t need to give a written explanation.

Example.

If you are a sales representative who calls on customers on an established sales route, you don’t have to give a written explanation of the business purpose for traveling that route. You can satisfy the requirements by recording the length of the delivery route once, the date of each trip at or near the time of the trips, and the total miles you drove the car during the tax year. You could also establish the date of each trip with a receipt, record of delivery, or other documentary evidence.

Confidential information.

You don’t need to put confidential information relating to an element of a deductible expense (such as the place, business purpose, or business relationship) in your account book, diary, or other record. However, you do have to record the information elsewhere at or near the time of the expense and have it available to fully prove that element of the expense.

What if I Have Incomplete Records?

If you don’t have complete records to prove an element of an expense, then you must prove the element with:

• Your own written or oral statement containing specific information about the element, and

• Other supporting evidence that is sufficient to establish the element.

If the element is the description of a gift, or the cost, time, place, or date of an expense, the supporting evidence must be either direct evidence or documentary evidence. Direct evidence can be written statements or the oral testimony of your guests or other witnesses setting forth detailed information about the element. Documentary evidence can be receipts, paid bills, or similar evidence.

If the element is either the business relationship of your guests or the business purpose of the amount spent, the supporting evidence can be circumstantial rather than direct. For example, the nature of your work, such as making deliveries, provides circumstantial evidence of the use of your car for business purposes. Invoices of deliveries establish when you used the car for business.

Table 5-1. How To Prove Certain Business Expenses

Sampling.

You can keep an adequate record for parts of a tax year and use that record to prove the amount of business or investment use for the entire year. You must demonstrate by other evidence that the periods for which an adequate record is kept are representative of the use throughout the tax year.

Example.

You use your car to visit the offices of clients, meet with suppliers and other subcontractors, and pick up and deliver items to clients. There is no other business use of the car, but you and your family use the car for personal purposes. You keep adequate records during the first week of each month that show that 75% of the use of the car is for business. Invoices and bills show that your business use continues at the same rate during the later weeks of each month. Your weekly records are representative of the use of the car each month and are sufficient evidence to support the percentage of business use for the year.

Exceptional circumstances.

You can satisfy the substantiation requirements with other evidence if, because of the nature of the situation in which an expense is made, you can’t get a receipt. This applies if all the following are true.

• You were unable to obtain evidence for an element of the expense or use that completely satisfies the requirements explained earlier under What Are Adequate Records.

• You are unable to obtain evidence for an element that completely satisfies the two rules listed earlier under What if I Have Incomplete Records.

• You have presented other evidence for the element that is the best proof possible under the circumstances.

Destroyed records.

If you can’t produce a receipt because of reasons beyond your control, you can prove a deduction by reconstructing your records or expenses. Reasons beyond your control include fire, flood, and other casualties.

Separating and Combining Expenses

This section explains when expenses must be kept separate and when expenses can be combined.

Separating expenses.

Each separate payment is generally considered a separate expense. For example, if you entertain a customer or client at dinner and then go to the theater, the dinner expense and the cost of the theater tickets are two separate expenses. You must record them separately in your records.

Combining items.

You can make one daily entry in your record for reasonable categories of expenses. Examples are taxi fares, telephone calls, or other incidental travel costs. Nonentertainment meals should be in a separate category. You can include tips for meal-related services with the costs of the meals.

Expenses of a similar nature occurring during the course of a single event are considered a single expense.

Car expenses.

You can account for several uses of your car that can be considered part of a single use, such as a round trip or uninterrupted business use, with a single record. Minimal personal use, such as a stop for lunch on the way between two business stops, isn’t an interruption of business use.

Example.

You make deliveries at several different locations on a route that begins and ends at your employer’s business premises and that includes a stop at the business premises between two deliveries. You can account for these using a single record of miles driven.

Gift expenses.

You don’t always have to record the name of each recipient of a gift. A general listing will be enough if it is evident that you aren’t trying to avoid the $25 annual limit on the amount you can deduct for gifts to any one person. For example, if you buy a large number of tickets to local high school basketball games and give one or two tickets to each of many customers, it is usually enough to record a general description of the recipients.

Allocating total cost.

If you can prove the total cost of travel or entertainment but you can’t prove how much it costs for each person who participated in the event, you may have to allocate the total cost among you and your guests on a pro rata basis. To do so, you must establish the number of persons who participated in the event.

If your return is examined.

If your return is examined, you may have to provide additional information to the IRS. This information could be needed to clarify or to establish the accuracy or reliability of information contained in your records, statements, testimony, or documentary evidence before a deduction is allowed.

How Long To Keep Records and Receipts

You must keep records as long as they may be needed for the administration of any provision of the Internal Revenue Code. Generally, this means you must keep records that support your deduction (or an item of income) for 3 years from the date you file the income tax return on which the deduction is claimed. A return filed early is considered filed on the due date. For a more complete explanation of how long to keep records, see Pub. 583, Starting a Business and Keeping Records.

You must keep records of the business use of your car for each year of the recovery period. See More-than-50%-use test in chapter 4 under Depreciation Deduction.

Reimbursed for expenses.

Employees who give their records and documentation to their employers and are reimbursed for their expenses generally don’t have to keep copies of this information. However, you may have to prove your expenses if any of the following conditions apply.

• You claim deductions for expenses that are more than reimbursements.

• Your expenses are reimbursed under a nonaccountable plan.

• Your employer doesn’t use adequate accounting procedures to verify expense accounts.

• You are related to your employer as defined under Per Diem and Car Allowances in chapter 6.

Reimbursements, adequate accounting, and nonaccountable plans are discussed in chapter 6.

Examples of Records

Table 5-2 and Table 5-3 are examples of worksheets that can be used for tracking business expenses.

• THIS IS NOT AN OFFICIAL INTERNAL REVENUE FORM

Table 5-2. Daily Business Mileage and Expense Log

• Name:

• THIS IS NOT AN OFFICIAL INTERNAL REVENUE FORM

Table 5-3. Weekly Traveling Expense Record

• From: To: Name:

Using the guidance

Keep the documents that establish the dates, amounts, and circumstances described above. References to other chapters, forms, worksheets, or earlier and later sections refer to the linked IRS publication. Check the full publication and its updates before relying on a rule for a different tax year or a situation not addressed here.

Sources and further reading

• Publication 463 (2025), Travel, Gift, and Car Expenses: Recordkeeping — How To Prove Expenses — Internal Revenue Service; 2025 edition.

The cited U.S. government text is in the public domain. Source accessed October 28, 2026. Fynoptic has organized this material for educational use and is independent of, and not endorsed by, the IRS.