UK Mileage Allowance and Advisory Fuel Rates Calculator

Price business journeys at HMRC's rates. Each row shows the rate's effective dates and its GOV.UK source. It covers two schemes:

• Approved mileage allowance payments, for employees' own cars, vans, motorcycles and bikes. The car and van rate rose from 45p to 55p a mile on 6 April 2026, and is 25p above 10,000 miles a tax year 1.
• Advisory fuel rates, for company cars. These change every quarter on 1 March, 1 June, 1 September and 1 December, and include electric home and public charging rates 4.

Rates change more often than people and AI assistants remember: GOV.UK's own worked example still uses 45p 1.

What it does

• Splits car and van miles at 10,000 a tax year, in date order, per employee. The count restarts on 6 April.
• Works out passenger payments (up to 5p a mile 3) and the National Insurance qualifying amount. National Insurance uses one rate for every mile 2.
• In the month after an advisory fuel rate change, GOV.UK allows the previous rates too 4. You get both in alternative, rather than the Actor choosing one.

Quick start

Prefill input:

{
  "journeys": [
    { "label": "Client visit, Leeds", "date": "2026-09-14", "miles": 120, "vehicle": "car", "passengers": 1 },
    { "label": "Site survey, crosses 10,000 miles", "date": "2026-09-21", "miles": 200, "vehicle": "car" },
    { "label": "Courier run", "date": "2026-09-22", "miles": 30, "vehicle": "motorcycle" },
    { "label": "Company car, petrol 1.6 litre", "date": "2026-09-10", "miles": 150, "vehicle": "car", "ownership": "company", "fuel": "petrol", "engineCc": 1598 },
    { "label": "Company EV, public charging", "date": "2026-08-20", "miles": 90, "vehicle": "car", "ownership": "company", "fuel": "electric-public" }
  ],
  "milesAlreadyClaimedThisTaxYear": 9850
}

The first of five rows:

{
  "index": 0,
  "label": "Client visit, Leeds",
  "employee": null,
  "date": "2026-09-14",
  "taxYear": "2026-27",
  "vehicle": "car",
  "ownership": "own",
  "miles": 120,
  "scheme": "approved mileage allowance payments",
  "fuel": null,
  "engineCc": null,
  "band": "first 10,000 miles",
  "ratePence": 55,
  "firstRatePence": 55,
  "secondRatePence": 25,
  "milesAtFirstRate": 120,
  "milesAtSecondRate": 0,
  "carVanMilesThisTaxYear": 9970,
  "amount": 66,
  "passengers": 1,
  "passengerAmount": 6,
  "nationalInsuranceQualifyingAmount": 66,
  "rateEffectiveFrom": "2026-04-06",
  "rateEffectiveTo": null,
  "alternative": null,
  "source": "https://www.gov.uk/expenses-and-benefits-business-travel-mileage/rules-for-tax",
  "checkedOn": "2026-10-04",
  "error": null
}

The other rows:

index	label	rate	amount	band
1	Site survey, crosses 10,000 miles	55p / 25p	£59.00	crosses 10,000 miles
2	Courier run	24p	£7.20	every business mile
3	Company car, petrol 1.6 litre	17p	£25.50	1401cc to 2000cc
4	Company EV, public charging	15p	£13.50	Public charger

Totals: mileage allowance £132.20, passenger payments £6.00, advisory fuel £39.00. The OUTPUT record adds the totals by employee and tax year, notes and sources.

Input

Field	Type	Meaning
journeys	array	Up to 10,000: date, miles, vehicle (car, van, motorcycle, bicycle), ownership (own or company). Company cars add fuel (petrol, diesel, lpg, electric-home, electric-public) and engineCc. Optional: passengers, employee, label
milesAlreadyClaimedThisTaxYear	number	Car and van miles already paid this tax year, for journeys without an employee
milesAlreadyClaimedByEmployee	object	The same, per employee: {"A123": 4200}

Output

Field	Meaning
scheme, band, ratePence	Scheme, band and rate (null when a journey crosses 10,000 miles)
firstRatePence, secondRatePence, milesAtFirstRate, milesAtSecondRate	The 10,000-mile split
amount, passengerAmount, nationalInsuranceQualifyingAmount	Pounds
rateEffectiveFrom, rateEffectiveTo, source, checkedOn	Where the rate came from
alternative	In the month after a change: the previous rate and amount
error	Null, or why the journey couldn't be priced

Use from code

curl -X POST "https://api.apify.com/v2/acts/landlordtools~uk-mileage-fuel-rates/run-sync-get-dataset-items?token=YOUR_API_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"journeys": [{"date": "2026-09-14", "miles": 120, "vehicle": "car"}]}'

import { ApifyClient } from 'apify-client';

const client = new ApifyClient({ token: 'YOUR_API_TOKEN' });
const run = await client.actor('landlordtools/uk-mileage-fuel-rates').call({
  journeys: [{ date: '2026-09-14', miles: 120, vehicle: 'car' }],
});
const { items } = await client.dataset(run.defaultDatasetId).listItems();
console.log(items[0].amount);

Use with AI agents

Agents can call it through Apify's MCP server (https://mcp.apify.com) instead of quoting rates from memory. Try: "What can I pay tax-free for 300 business miles in my own car in September 2026?"

Limits

• Mileage allowance: journeys from 6 April 2024.
• Advisory fuel rates: journeys from 1 September 2024, the earliest table GOV.UK lists.
• Future journeys: a date after today is refused until HMRC publishes its rates.
• Hybrids: use petrol or diesel 4.
• Data: bundled rates, checked on 4 October 2026.
• General information, not tax advice.

Integrations

Power Platform, OpenAPI, Excel and Google Sheets files are in integrations/README.md. Apify's Zapier, Make and n8n apps work too.

Pricing

Pay per event: $0.002 per journey ($2 per 1,000), plus Apify's minimal start fee.

Related Actors

• UK Tax Year and Week Helper: tax years and weeks.
• UK Business Deadlines: filing dates.
• UK Working Days: working days and bank holidays.

Sources

1. GOV.UK: Business travel mileage, rules for tax. Accessed 4 October 2026.
2. GOV.UK: Business travel mileage, rules for National Insurance. Accessed 4 October 2026.
3. GOV.UK: Business travel mileage, passenger payments. Accessed 4 October 2026.
4. GOV.UK: Advisory fuel rates. Accessed 4 October 2026.