Business mileage deductions explained for retirees

Published November 9, 2025 · 2 min read

Business mileage deductions explained for retirees, with a worked example, a checklist and the mistakes to avoid.

Why this matters for retirees

In retirement, income comes from pensions, savings and investments that are each taxed differently, so planning withdrawals can save real money.

Worked example

Here is the calculation with sample figures. Change any number in the Mileage Deduction Calculator to run your own.

Business mileage deductions: how it works

Business miles can be deducted at a standard rate per mile instead of tracking every fuel and repair cost.

Commuting between home and a regular workplace usually does not count.

A second example with larger figures

Scaling the inputs up shows how the result moves. Percentages stay the same, so the tax grows in proportion to the amount it is applied to.

Using the calculator step by step

1. Open the Mileage Deduction Calculator.
2. Enter your own figures on each numbered line.
3. Set the rate to the one that applies to you. Defaults are examples, not advice.
4. Read the result and the formula below it.

Key terms

Marginal rate

The rate applied to the next unit of income. It decides how much of a raise or a deduction you keep.

Taxable income

Income left after allowances and deductions, on which the tax rates are applied.

Zero rate

A rate of 0% on a taxable supply. Unlike an exemption, the seller can usually still reclaim tax on costs.

Tax credit

An amount subtracted directly from the tax bill, worth its full face value.

Standard rate

The rate that applies to most goods and services unless a specific reduced rate, zero rate or exemption applies.

A quick checklist for retirees

1. Keep a dated mileage log.
2. Separate business and personal trips.
3. Apply the current rate.

Common mistakes to avoid

• Claiming commuting miles.
• Estimating miles at year-end without a log.

Frequently asked questions

This article is general information for planning, not tax advice. Rates and rules change; confirm with your tax authority or a qualified adviser.