---
title: "Company Car Business vs Private Mileage UK | DriveQuery"
description: "Understand HMRC company-car business and private mileage rules, ordinary commuting, business-only cars and the records that help support actual use."
canonical: "https://drivequery.com/en/company-car-business-private-mileage/"
language: "en-GB"
content_signal: "search=yes, ai-input=yes, ai-train=yes, use=full"
last_modified: "2026-08-30"
ai_priority: "tier-1"
primary_intent: "company-car-business-private-classification"
commercial_stage: "consideration"
query_targets: "company car business mileage; company car private mileage; company car mileage claim; business vs private mileage; ordinary commuting HMRC"
image: "https://drivequery.com/assets/trip-journal.webp"
publisher: "DriveQuery"
---
[Home](https://drivequery.com/en/) / [Guides](https://drivequery.com/en/guides/) / Company car business vs private mileage

Company car · HMRC · Business vs private use

# Company car business vs private mileage: when does HMRC treat a journey as private?

A company car can be tax-free only in limited business-only situations. The practical challenge is proving what the car was actually used for — especially because ordinary commuting normally counts as private use.


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## Quick answer

For a company car, **business mileage, ordinary commuting and private travel are not interchangeable**. Whether a journey qualifies as business travel depends on the employment facts and HMRC travel rules, not simply on where the Tesla drove.

DriveQuery can automate the factual journey record — time, distance and route context — while keeping the final purpose classification visible for review.

## Questions this page answers

- What counts as business mileage in a company car?
- Is home-to-work commuting business or private mileage?
- Can I claim business mileage in a company Tesla?
- How should I record mixed business and private use?
- Can a Tesla automatically identify every journey's tax purpose?
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Updated 16 August 2026 HMRC guidance checked 16 August 2026 ≈ 8 min read UK · HMRC

**For company-car tax, “private use” is broader than leisure driving.** HMRC treats any use that is not business travel as private use. In particular, a normal journey between home and a permanent workplace is ordinarily private travel.

**The business-only exception has two tests** The terms on which the car is provided must **prohibit private use**, and the car must **not actually be used privately**. A mileage log can help evidence the second test, but it does not replace the first.

Ordinary commute**Private**Home ↔ permanent workplace is normally private use.

Client / inter-site**Business**Travel in the performance of duties can be business travel.

Temporary workplace**Check context**The temporary-workplace rules and the facts determine treatment.

## 1. Why business and private mileage matter for a company car

A company car made available to an employee is normally treated as available for private use. That can create a taxable company-car benefit. HMRC provides an exception where private use is genuinely prohibited and does not happen in practice.

This makes the journey record more than an expenses tool. It can help an employer see whether the actual use of a business-only vehicle matches the written policy.

## 2. HMRC's two-part test for a business-only company car

Test 1

### Private use is prohibited

The terms on which the car is made available must genuinely prohibit private use.

Test 2

### No actual private use

The vehicle must not in fact be used privately during the relevant period.

Both parts matter. HMRC guidance says an intended ban on private use is not enough if private driving actually occurs.

## 3. Ordinary commuting normally counts as private use

This is the point most likely to surprise drivers. Travel from home to a permanent workplace is normally **ordinary commuting**, and HMRC treats ordinary commuting as private use for company-car benefit purposes.

Home → Permanent office**Private · Ordinary commute**Normally private use for company-car benefit

Office → Client A**Business · Client visit**Journey in the performance of duties

Home → Temporary workplace**Potential business travel**Depends on the temporary-workplace rules and facts

Journey patternPractical HMRC treatment

Home → permanent office**Normally private.** This is ordinary commuting even if the employer owns the car.

Permanent office → client**Normally business.** The journey is made in the performance of the employee's duties.

Client A → Client B**Normally business.** Keep the purpose and locations with the journey record.

Home → temporary workplace**Potentially business.** The temporary-workplace rules and the facts still need to be satisfied.

Evening leisure trip**Private.** A short private journey can matter where the employer relies on the business-only exemption.

There can be fact-specific exceptions, but a normal commute should not be silently labelled as business mileage just because the vehicle belongs to the employer.

## 4. A mileage log helps with actual use — but does not prove everything

A clean mileage record can show that the journeys captured during the period were business journeys rather than private journeys. But it cannot by itself prove that the car was never *available* for private use or that the employer had an effective contractual prohibition.

For Tesla journey capture, see the [business mileage tracker](https://drivequery.com/en/tesla-mileage-tracker-business/). Keep the classification evidence separate from the tax calculation: EV BIK is covered in the [electric car company car tax guide](https://drivequery.com/en/tesla-company-car-tax/).

HMRC's public guidance tells employers providing cars for business journeys only to tell employees not to use them privately **and check that they do not**. DriveQuery can support that checking process by making the journey history reviewable.

1**Capture**Date, time, route and distance are recorded from the available Tesla journey data.

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2**Add context**Known places and recurring routes can suggest a likely category without deciding the tax treatment.

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3**Review**The driver or employer confirms business purpose, ordinary commuting or private use where context matters.

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4**Close the period**Exceptions are resolved before the monthly record is used for payroll, tax or fleet review.

### Turn raw Tesla journeys into a reviewable company-car record

## 5. What should a useful company-car journey record contain?

For a practical audit trail, keep the factual trip data together with the reason for the journey. A useful record includes:

- Date and time
- Start and end locations
- Distance
- Journey purpose
- Business / ordinary commute / private classification
- Driver confirmation where the purpose is not obvious

DriveQuery can collect available route, time and distance data automatically through the Tesla connection. The driver or employer should still confirm the purpose where tax treatment depends on context.

### Example: what a review-ready month can look like

| Date | Route | Purpose | Class | Miles | Status |
| --- | --- | --- | --- | --- | --- |
| 3 Aug | Home → permanent office | Normal workday | Private commute | 18 | Confirmed |
| 3 Aug | Office → Client A | Client meeting | Business | 27 | Confirmed |
| 4 Aug | Home → Project site | Temporary assignment | Business\* | 41 | Workplace rule checked |
| 6 Aug | Home → New destination | Not entered | Unclassified | 12 | Needs review |

\*Illustrative only. A journey to a project site is not automatically business travel; the temporary-workplace conditions still need to be satisfied.

## 6. Company Tesla mileage reimbursement is a separate question

Whether a company car creates a taxable benefit and how an employee is reimbursed for business electricity are different issues. For a company Tesla, HMRC's Advisory Electric Rates can be used for qualifying business mileage reimbursement.

If private use is available and the car benefit applies, see the [Tesla company car tax guide](https://drivequery.com/en/tesla-company-car-tax/) and the [BIK calculator](https://drivequery.com/en/tesla-company-car-tax-calculator/).

[See the company Tesla business mileage and Advisory Electric Rate guide →](https://drivequery.com/en/company-tesla-business-mileage/)

Company carEmployee's own car

The business/private split can affect the company-car benefit position and evidence of actual use.The main reimbursement framework is normally Approved Mileage Allowance Payments for qualifying business travel.

For a fully electric company car, qualifying business electricity reimbursement can use HMRC's Advisory Electric Rates.Do not apply company-car Advisory Electric Rates as if they were the own-car mileage allowance.

## 7. Pool cars have their own exemption rules

Pool cars are another distinct HMRC category. Broadly, they must be shared for business use and normally kept at the employer's premises, with private use restricted to what the pool-car rules allow. A vehicle does not become a pool car merely because more than one employee drives it.

If a fleet relies on pool-car treatment, route history can still be useful operational evidence, but the full HMRC pool-car conditions need to be considered separately.

## 8. How DriveQuery can reduce the admin

The hard part is not calculating a percentage. It is reconstructing hundreds of journeys months later. DriveQuery can record Tesla journeys continuously, learn recurring categories and place uncertain routes in a review queue.

Example month

## 1,184 miles recorded

Every journey captured from the Tesla history.

Business

### 1,071 miles

Confirmed client and inter-site journeys.

Needs review

### 3 journeys

New routes requiring a purpose before the report is closed.

DriveQuery workflow

## Record every journey. Review the exceptions.

A business-only policy is only useful if actual use follows it. Make the Tesla trip history searchable, categorised and easy to review before payroll, tax or fleet teams need the evidence.

[Explore the UK Tesla mileage log →](https://drivequery.com/en/tesla-mileage-log/)

## Frequently asked questions

Does commuting in a company car count as private use?

Normally yes. HMRC treats ordinary commuting between home and a permanent workplace as private use for company-car benefit purposes.

Can a company car be exempt from the car benefit charge if it is business only?

Potentially, but both conditions must be met: the terms on which the car is provided must prohibit private use and the car must not actually be used privately.

Is a mileage log enough to prove there is no company-car benefit?

No. A mileage log can support evidence of actual journeys, but HMRC also looks at whether private use was genuinely prohibited and whether the vehicle was available on those terms.

Is travel to a temporary workplace private mileage?

Not necessarily. A qualifying temporary-workplace journey can be business travel, while ordinary commuting to a permanent workplace is normally private travel. The detailed travel rules depend on the facts.

Are pool cars automatically exempt?

No. HMRC has specific conditions for pool cars, including how they are shared, used and normally kept. Simply sharing a car does not automatically make it a qualifying pool car.

Is company-car business mileage the same as using my own car for work?

No. The journey may still need to qualify as business travel, but the reimbursement and tax frameworks are different. Own-car mileage normally uses the AMAP framework, while a fully electric company car can use HMRC's Advisory Electric Rates for qualifying business electricity reimbursement.

DriveQuery can help organise Tesla journey evidence, but it cannot by itself determine whether a company car is legally unavailable for private use or whether an HMRC exemption applies. Employers should apply their own policy and obtain tax advice where necessary.

Sources: [HMRC – meaning of private use and business travel](https://www.gov.uk/hmrc-internal-manuals/employment-income-manual/eim23305), [HMRC – private use prohibited and none occurs](https://www.gov.uk/hmrc-internal-manuals/employment-income-manual/eim23400), [HMRC – no actual private use](https://www.gov.uk/hmrc-internal-manuals/employment-income-manual/eim23410), [GOV.UK – company cars: what's exempt](https://www.gov.uk/expenses-and-benefits-company-cars/whats-exempt) and [GOV.UK – reporting company cars to HMRC](https://www.gov.uk/tell-hmrc-company-car).

HMRC business-only test

**Prohibited + no actual private use.**

- Ordinary commuting is normally private
- Journey purpose matters
- A log supports actual-use evidence
- Employer policy still matters

[Tesla mileage log](https://drivequery.com/en/tesla-mileage-log/)[Company Tesla reimbursement →](https://drivequery.com/en/company-tesla-business-mileage/)

## Make company-car use reviewable.

DriveQuery is being built to capture Tesla journeys automatically, separate business from ordinary commuting and private travel, and leave only uncertain trips for review.

[Join the waitlist](https://drivequery.com/en/company-car-business-private-mileage/#early-access)