Mileage subsistence bookkeeping Ireland director claims need careful records because Revenue expects business travel payments to be supported by clear evidence, not rough estimates.
For company directors, the risk is higher than it looks. A payment can be a genuine reimbursement, a taxable allowance, a benefit-in-kind or a director's loan account movement depending on the facts. The bookkeeping needs to record both the amount and the reason it was paid.
Why are mileage and subsistence bookkeeping-sensitive?
Mileage and subsistence are bookkeeping-sensitive because they sit between payroll, tax compliance , expenses and director records.
If a director uses a private car for business travel, the company may reimburse mileage at approved civil service rates where the journey qualifies. If a director works away from the normal place of work, subsistence may also be available. But the claims must be supported by records of each business journey.
The issue is not only the amount paid. Revenue may ask whether the journey was genuinely business-related, whether the rate was correct, whether the director was away from the normal place of work, and whether the company kept the right backup.
A weak record can turn a clean reimbursement into a disputed expense. It can also create payroll or benefit-in-kind questions.
Directors should treat travel claims as part of wider company records , not as informal cash withdrawals.
What must be in a compliant mileage log?
A mileage log should show the business purpose, distance and rate for every journey claimed.
At a minimum, the log should include the date, starting point, destination, reason for the journey, kilometres travelled, vehicle details, engine size band, cumulative annual kilometres and the rate used. It should also show who approved the claim and when it was paid.
A practical mileage log includes:
Date of journey
Origin and destination
Business purpose
Kilometres travelled
Vehicle and engine capacity
Annual mileage band
Rate per kilometre
Total claim amount
Approval record
Payment date
The purpose field matters. "Meeting" is weaker than "client onboarding meeting in Galway". The second version explains why the trip happened and why it was connected to the company. We've seen mileage logs rejected in practice because every entry just said 'client meeting'. Three extra words per line is all it takes to close that gap
Author's tip: Keep the log as the journey happens. Rebuilding a mileage record months later is slower, less reliable and more likely to miss the details Revenue would expect which could lead to Revenue disallowing it.
What counts as subsistence and how should it be recorded?
Subsistence is a payment for allowable meals or accommodation when someone is away from their normal place of work on qualifying business.
Revenue's current civil service subsistence guidance includes day allowance bands for assignments of between 5 and 10 hours and for 10 hours or more. Day subsistence requires the assignment to be outside eight kilometres of the director's home and normal place of work. Overnight subsistence is stricter. The assignment must be at least 100 kilometres from both home and normal place of work. Getting the wrong threshold is a common error and can turn what looks like a valid claim into a taxable payment.
The bookkeeping record should show:
Date of assignment
Location
Business purpose
Start and end time
Whether the claim is day or overnight subsistence
Rate used
Supporting approval
Subsistence is not a general lunch allowance. Normal commuting and ordinary meals near the normal place of work should not be treated as tax-free subsistence just because the director was working that day.
This distinction matters for PAYE system treatment if a payment crosses into taxable pay.
How do civil service rates affect director claims?
Civil service rates provide Revenue-accepted benchmarks for mileage and subsistence, but only when the underlying journey qualifies.
As of June 2026, Revenue publishes civil service mileage and subsistence rates for qualifying business travel. The mileage rates vary by vehicle type, engine capacity and annual distance band. Subsistence rates vary by duration and whether the assignment is within or outside the State.
The rate is only one part of the test. A correct rate applied to a non-business journey is still a problem. A business journey with no log is also a problem.
Common errors include:
Paying a flat monthly travel allowance
Claiming home-to-office commuting
Using the wrong engine band
Ignoring cumulative annual mileage bands
Paying subsistence for ordinary working days
Missing approval records
Please note: Civil service rates are not a shortcut around record-keeping. They help support the amount claimed, but they do not prove the journey happened or that it was for business.
Reimbursement or benefit-in-kind: where is the line?
A reimbursement repays a genuine business tax deduction , while a benefit-in-kind gives the director a personal benefit that may need payroll treatment.
If the company reimburses a director for a properly logged client journey in a private car, that may be a business reimbursement. If the company pays a round-sum allowance every month without records, Revenue may view it differently. If the company provides a car for private use, benefit-in-kind rules can apply.
The bookkeeping should make the distinction visible. Do not post every director payment to a generic travel expense account. Use clear categories such as mileage claims, subsistence claims, director reimbursements and taxable benefits.
Since 1 January 2024, where payments are non-taxable but reportable, Enhanced Reporting Requirements also apply. This means an ERRreturn is required on or before each date any employee receives any of the reportable elements. This is a real-time obligation, not a periodic one. Our glossary entry on ERR reporting explains the wider reporting context for certain benefits and expenses.
How should mileage and subsistence be posted in the books?
Mileage and subsistence claims should be posted as company expenses only when they are supported and approved.
For a director, the claim can be paid through the bank, reimbursed through payroll, or credited through the director's loan account. The route matters because the books should show whether the company owes the director, has paid the director, or has created a loan account movement .
A simple approach is:
Approve the claim with supporting log
Post the overhead costs to travel or subsistence
Credit director's loan account or employee reimbursements payable
Clear the payable when the bank payment is made
Keep the log with the accounting record
VAT usually needs separate care. Mileage paid at civil service rates is not the same as a supplier invoice with VAT. Fuel receipts, company cars and mixed-use expenses can create different issues, so do en.
If a vehicle is owned by the company, also consider whether capital allowances and BIK records are relevant.
In practice, the most common mistake we see is mileage being paid from the company account with no corresponding director's loan credit, which means the payment sits in limbo until year-end cleanup
What should an audit-ready director expense file include?
An audit-ready file should allow someone independent to trace each claim from business reason to payment.
For each claim period, keep the mileage log, subsistence details, approval, rate source, payroll treatment if relevant, bank payment and bookkeeping entry. For directors, it is also sensible to keep a short note where the trip purpose could otherwise look personal.
At year end, review:
Total mileage by director
Total subsistence by director
Claims posted through the director's loan account
Any round-sum payments
Any BIK or payroll adjustments
Any ERR reporting records
Supporting logs and approvals
This protects the company and the director. It also supports the directors' duties to keep proper records and act responsibly in company administration.
To do this correctly, we recommend taking the time to document the trips as you go. We've seen directors who tried to reconstruct a year's mileage from calendar entries the week before their accountant needed it. It took three times longer than logging as you go, and there were still gap
What to do next
Mileage and subsistence claims are manageable when the paperwork leads the bookkeeping.
Use a standard claim template, record journeys as they happen, apply the correct rate, approve claims before payment and reconcile them at year end. Open Forest can help you put that structure in place so director expenses are clear, supportable and aligned with tax compliance .
