Delaware Mileage Reimbursement 2026: Laws, IRS Rate & Employer Rules

When employees use their personal vehicles for work in Delaware, the mileage reimbursement rate depends on who they work for and why they are driving.

Private employers have flexibility in how they reimburse ordinary business mileage because Delaware does not set a universal per-mile rate for private-sector employers. 

State employees follow a separate statutory rate, while workers’ compensation medical travel has its own reimbursement requirement.

For private employers looking for a benchmark, the IRS standard mileage rate is often a useful starting point. In 2026, the business rate is 72.5 cents per mile from January 1 through June 30 and 76 cents per mile beginning July 1.

Here’s what Delaware employers and employees need to know about mileage reimbursement in 2026.

What Is the Delaware Mileage Reimbursement Rate for 2026?

Delaware does not have one mandatory mileage reimbursement rate that applies to ordinary business driving by all private-sector employees.

For private employers, the optional IRS standard mileage rate is commonly used as a benchmark. The 2026 IRS business mileage rates are:

• January 1 through June 30, 2026: 72.5 cents per business mile
• July 1 through December 31, 2026: 76 cents per business mile

The IRS increased the business rate mid-year. Its current rate table confirms the 76-cent rate for business use beginning July 1, 2026.

The IRS standard mileage rate is optional. Employers can use it as the basis for a Cents-Per-Mile reimbursement program or choose another reimbursement structure based on employee driving patterns and business-required vehicle costs.

Delaware state employees follow a different rate. Under 29 Del. C. § 7102, the statutory mileage rate for employees of the state, its agencies, and departments is 50 cents per mile.

Do Private Employers Have to Reimburse Mileage in Delaware?

Delaware does not establish a general statutory per-mile reimbursement rate that private employers must pay for ordinary business driving.

That gives private employers flexibility in how they reimburse employees who use personal vehicles for work. 

An employer might use the IRS standard mileage rate, establish another CPM rate, or use a reimbursement program designed around employees’ real, business-required vehicle costs.

There is an important distinction once an employer agrees to provide reimbursement.

Delaware Code § 1109 defines reimbursement for expenses as a benefit or wage supplement. 

An employer that is party to an agreement to provide that benefit is required to provide the agreed benefit within the timeframe set by the statute. 

In other words, Delaware may not require every private employer to create a mileage reimbursement policy, but an employer that promises expense reimbursement should follow the terms of that commitment.

Employment agreements, collective bargaining agreements, and written company policies can therefore matter when determining an employer’s reimbursement obligations.

Workers’ compensation medical mileage is separate and has its own statutory reimbursement requirement.

When Can Mileage Reimbursement Be Tax-Free in Delaware?

The tax treatment of mileage reimbursement depends on how the reimbursement arrangement is structured and documented.

Under IRS Publication 463, an accountable plan generally requires three things:

1. The expense must have a business connection.
2. The employee must adequately account for the expense within a reasonable period.
3. The employee must return any excess reimbursement or allowance within a reasonable period.

When those requirements are satisfied, qualifying reimbursements generally are not reported as employee wages.

For business driving, employees should maintain records showing information such as mileage, dates, destinations, and the business purpose of each trip.

Using the IRS standard mileage rate by itself does not make a reimbursement tax-free. 

The arrangement also needs to meet applicable accountable-plan and substantiation requirements.

For allowances above the applicable federal rate, the excess can generally be treated as wages even when the substantiated portion up to the federal rate qualifies for accountable-plan treatment.

Delaware’s employer withholding guidance also says reimbursed travel expenses should be separately identified and generally follows federal withholding treatment when determining whether an amount is subject to Delaware withholding.

What Counts as Business Mileage in Delaware?

Business mileage generally involves driving for a legitimate work purpose rather than an employee’s ordinary commute between home and a regular workplace.

Common examples can include driving from an office to a customer location, traveling between job sites during the workday, making deliveries or service calls, and traveling to certain temporary work locations.

Under federal tax rules, ordinary travel between an employee’s home and regular workplace is generally treated as personal commuting.

Defining business versus personal vehicle use in a company mileage policy can make it easier for employees to track qualifying trips consistently.

For Delaware state employees specifically, state law also expressly excludes mileage between an employee’s residence and principal place of state employment from reimbursement.

What Is the Delaware State Employee Mileage Rate for 2026?

Delaware has a specific statutory mileage reimbursement framework for state employees.

Under 29 Del. C. § 7102, the authorized mileage rate for employees of the state, its agencies, and departments is 50 cents per mile. 

That rate became effective July 1, 2023 and remains the rate stated in the current Delaware Code.

State employees also have documentation requirements.

Section 7103 requires a claimant to submit an itemized statement showing the number of miles traveled during the period covered by the claim. 

The claimed mileage must represent miles actually traveled in the course of state business.

Ordinary commuting is excluded. Mileage between a state employee’s residence and principal place of employment with the state is generally not reimbursable.

Delaware also imposes penalties for improper mileage claims. 

Section 7104 provides for fines when mileage above the statutory rate is paid, claimed, or received. 

A recipient who receives mileage in violation of § 7103 can also be civilly liable to the state for twice the excess allowance received.

These rules apply to Delaware government travel. The state’s 50-cent rate does not establish the mileage reimbursement rate private employers must use.

What Is the Delaware Workers’ Compensation Mileage Rate for 2026?

Delaware workers’ compensation law separately requires mileage reimbursement for qualifying medical travel.

Under 19 Del. C. § 2322(g), an employee is entitled to mileage reimbursement at the state-specified mileage allowance rate in effect at the time of travel when traveling to obtain qualifying medical services or supplies.

The statute covers travel to obtain reasonable surgical, medical, dental, optometric, chiropractic, and hospital services. 

It also covers qualifying travel to obtain medicines and supplies, including certain hearing aids and prosthetic devices.

Delaware’s current statutory mileage allowance for state employees is 50 cents per mile, so that is the relevant state mileage benchmark while the statutory rate remains unchanged.

That rate is separate from the IRS business mileage rate. 

Beginning July 1, 2026, the IRS business rate is 76 cents per mile, while Delaware’s statutory state employee rate remains 50 cents.

Employers and employees handling a workers’ compensation claim should check the current Delaware Code when calculating reimbursement because § 2322(g) applies the state-specified rate in effect at the time of travel.

What Mileage Reimbursement Options Can Delaware Employers Use?

Private employers can choose among several approaches for reimbursing employees for the real, business-required costs of using personal vehicles for work.

Cents-Per-Mile (CPM)

Cents-Per-Mile reimburses employees using a set amount for each qualifying business mile.

Employers can use the IRS standard mileage rate or establish another appropriate rate. 

CPM can work well for employees who drive occasionally because reimbursement directly follows documented business mileage.

Fixed and Variable Rate (FAVR)

Fixed and Variable Rate reimburses employees for the real, business-required fixed and variable costs associated with owning and operating personal vehicles for work.

Fixed expenses can include depreciation, insurance, registration, and other ownership costs. Variable expenses can include fuel, maintenance, and tires.

Separating these categories allows reimbursement to account for differences in business mileage and geographically variable vehicle expenses. 

FAVR is an IRS-recognized mileage allowance methodology with specific requirements.

Tax-Free Car Allowance (TFCA)

A Tax-Free Car Allowance is an accountable reimbursement arrangement designed around the real, business-required costs employees incur when using personal vehicles for work.

Tax-free treatment depends on satisfying applicable accountable-plan requirements, including adequately substantiating business expenses and handling excess payments appropriately.

Companies with different driver populations can also use a mixed mileage reimbursement strategy. 

For example, FAVR can support employees with substantial recurring business mileage, while CPM can work well for employees who drive less frequently.

How Should Delaware Employers Manage Mileage Reimbursement?

A clear mileage reimbursement policy can help employees understand which trips qualify, how mileage should be recorded, which reimbursement method applies, and when reimbursement will be paid.

That written policy matters in Delaware because agreed expense reimbursement can qualify as a benefit or wage supplement under state law. 

Employers should make sure the policy accurately reflects what the company intends to reimburse and then administer it consistently.

Accurate mileage records also support accountable-plan requirements and give Finance, HR, and Operations teams better visibility into business driving and reimbursement costs.

Employers should review their programs regularly because federal and state rates can change independently. Delaware illustrates that clearly in 2026. 

The IRS business mileage rate is 72.5 cents per mile for the first half of the year and 76 cents beginning July 1, while Delaware’s statutory state employee mileage rate remains 50 cents per mile.

Build a Mileage Reimbursement Program That Fits Your Delaware Drivers

Delaware private employers have flexibility in how they structure ordinary business mileage reimbursement. 

Federal tax requirements, employer reimbursement commitments, and Delaware’s separate rules for state employees and workers’ compensation travel make clear policies and accurate records important.

The right approach depends on how often employees drive, where they work, and the real, business-required costs associated with using their personal vehicles.

Cardata helps companies design and manage mileage reimbursement programs, including FAVR, CPM, TFCA, and mixed programs for different driver groups. 

From mileage capture and reimbursement calculations to compliance support and direct-to-driver payments, Cardata helps make mileage reimbursement simpler for employees and easier for Finance, HR, and Operations teams to manage.

Talk to Cardata about building a mileage reimbursement program for your Delaware drivers.