A customer hands you cash, you hand them a receipt, and everyone goes home happy. That’s how it worked for years. But Revenue sees it differently. And if you’ve ever been through a Revenue compliance check — or heard from a neighbour who has — you’ll know that a handwritten docket with a total and your mobile number is not a valid invoice.
Most Irish garages invoice correctly most of the time. But “most of the time” is not a standard that protects you. If a customer disputes a job, if you’re ever audited, or if you simply want your accountant to stop wincing when they open your records, your invoices need to meet the legal requirements every time.
This guide covers exactly what Revenue requires on a valid garage invoice in Ireland, when the rules kick in, and how proper garage invoicing software makes compliance automatic rather than something you have to remember.
Why invoice compliance matters for garages
Invoicing feels like an administrative detail until it isn’t. Here is when it actually matters:
Revenue audit. If Revenue audits your business, every invoice you’ve issued is scrutinised. Missing mandatory fields mean invalid invoices — and invalid invoices can mean disallowed VAT claims, penalties, and interest.
Customer disputes. If a customer refuses to pay and you need to pursue the debt, you need a valid invoice. A document that doesn’t meet the legal requirements is harder to enforce.
VAT reclaim. Your business customers need a proper VAT invoice to reclaim the VAT they’ve paid you. If your invoice is missing the right information, you’re creating problems for them — and potentially damaging the relationship.
Accountant and bookkeeping accuracy. Clean, complete invoices make month-end straightforward. Inconsistent invoices create reconciliation headaches and the kind of conversations with your accountant that nobody enjoys.
Are you required to issue VAT invoices?
First, it’s worth understanding whether VAT invoicing applies to you.
If your garage is VAT-registered, you are required to issue VAT invoices for any taxable supply of goods or services. Most Irish garages that have been trading for more than a year or two will be above the VAT threshold and therefore registered.
The current VAT registration thresholds in Ireland are:
- €42,500 per year for businesses supplying services
- €85,000 per year for businesses supplying goods (or a mix, where goods make up 90% or more of turnover)
If your annual turnover is above these figures, VAT registration is compulsory. Below them, it’s optional — but many garages register voluntarily to reclaim VAT on parts and supplies.
If you are VAT-registered, the rules below apply to every invoice you issue.
The two types of VAT invoice
Revenue recognises two types of VAT invoice, and which one you can issue depends on the value of the transaction.
Full VAT invoice
Required for any transaction over €100 (exclusive of VAT). This is the standard invoice for most garage work — a service, a repair, a set of tyres. A full VAT invoice must contain all of the mandatory fields listed below.
Simplified VAT invoice
Permitted for transactions of €100 or less (exclusive of VAT). This applies to small parts sales, minor repairs, or low-value accessories. A simplified invoice has fewer mandatory requirements, which are listed separately below.
What must appear on a full VAT invoice
These are the mandatory fields for a full VAT invoice under Irish law, as set out in the VAT Consolidation Act 2010 and aligned with EU VAT Directive 2006/112/EC.
1. The word “Invoice”
The document must be clearly identified as an invoice. Not a receipt, not a docket — an invoice.
2. A sequential invoice number
Every invoice must have a unique sequential number. This number must be part of a series — no gaps, no duplicates. Revenue uses invoice number sequences to check that invoices haven’t been deleted or suppressed. Jumping from INV-1050 to INV-1090 raises questions.
3. Date of issue
The date the invoice is issued must be shown. This is separate from — and may differ from — the date the work was carried out.
4. Date of supply (if different from issue date)
If the date you supplied the service or goods differs from the invoice date, you must show the date of supply as well. In practice, for most garage work this is the same date, but if you invoice at month-end for work done throughout the month, the date of supply should be included.
5. Your full business name and address
Your business name exactly as registered with Revenue, and your full business address including Eircode. If you trade under a business name different from your registered name, check which one Revenue recognises for your registration.
6. Your VAT registration number
Your VAT number must appear on every full VAT invoice. It is typically formatted as IE followed by eight characters — for example, IE1234567T. Without this, the invoice is not a valid VAT document, regardless of what else is on it.
7. Customer name and address
The full name (or business name) and address of your customer. For private customers, this is their home address. For business customers — trade accounts, fleet operators, insurance companies — use their registered business address.
This is a requirement that many garages miss on invoices for regular customers. “Joe, Ballybrack” is not a customer address.
8. A description of the goods or services supplied
Enough detail that the supply can be identified. “Service” on its own is not sufficient. “Full service — 2021 Ford Transit 2.0 TDCI” is. “Brake pads and discs — front axle — 2019 VW Passat” is. The description should clearly relate to the vehicle and the work done.
This matters for two reasons. First, Revenue needs to see that the supply is genuine and taxable. Second, your customer needs enough detail to reclaim VAT if they’re a business.
9. The quantity of goods or extent of services
How many of each item you supplied. For parts, this is straightforward — two brake pads, four litres of oil. For labour, it’s the number of hours or a description of the scope of work.
10. The unit price (excluding VAT)
The price per item or per unit of service, before VAT is applied.
11. Any discounts applied
If you’ve given a discount on parts or labour, it must be shown on the invoice. This is relevant for trade accounts where you apply regular discounts.
12. The taxable amount per VAT rate
If your invoice includes items at different VAT rates — which happens regularly in garages (more on this below) — you must show the taxable amount for each rate separately. So the total for items at 23% and the total for items at 13.5%, listed independently before VAT is added.
13. The VAT rate applied
The percentage rate of VAT applied to each taxable amount. In Ireland, the rates relevant to garage work are currently 23% and 13.5%.
14. The VAT amount payable
The actual euro amount of VAT charged. This must be shown clearly — not buried in the total, not implied by the rate.
15. The gross total (including VAT)
The total amount due from the customer, inclusive of all VAT.
What must appear on a simplified VAT invoice
For supplies of €100 or less (exclusive of VAT), a simplified invoice can be issued. It needs:
- The word “Invoice”
- Your business name, address, and VAT number
- Date of issue
- Description of the goods or services
- VAT rate applied
- Total amount payable including VAT
The simplified invoice does not need to show the customer’s details, the unit price breakdown, or the VAT amount separately (only the rate). However, your business customer cannot use a simplified invoice to reclaim VAT in all circumstances — they may request a full invoice even for low-value transactions.
VAT rates for garage work: where garages get this wrong
This is the part that catches garages out. Not all garage work is taxed at the same rate.
23% VAT applies to:
- Spare parts and accessories supplied separately (not as part of a repair)
- Tyres supplied separately
- Most goods you sell at retail
13.5% VAT applies to:
- Labour for repair, maintenance, and servicing of motor vehicles
- Parts supplied as part of a service or repair (the composite supply rule applies here — if the parts are integral to a service you’re supplying, the whole supply can take the lower rate)
In practice, a typical service invoice may have labour and included parts at 13.5%, and separately sold accessories or parts at 23%. These must be itemised separately on the invoice with the correct rate applied to each.
Applying 23% across the board means you’ve overcharged VAT on labour. Applying 13.5% to standalone parts sales means you’ve undercharged. Either way, Revenue will find it if they look.
This is precisely where garage invoicing software earns its place. When you build an invoice from a job card, the system applies the correct rate to each line automatically — labour at 13.5%, parts at 23%, without you having to remember or check each time.
Credit notes: the invoicing rules apply here too
When you issue a credit note — to correct an invoice error, process a refund, or adjust a charge — the same legal standards apply as for the original invoice.
A valid credit note must:
- Be clearly identified as a credit note
- Reference the original invoice number
- Include your VAT number and business details
- Show the amount being credited and the VAT being reversed
- Carry its own sequential credit note number
A credit note is a VAT document. It reduces the VAT you’ve collected and — for your business customers — reduces the VAT they can reclaim. Revenue treats it with the same seriousness as an invoice.
Issuing a “negative invoice” or adjusting an existing invoice number is not the correct approach. Each credit note needs its own reference in its own sequence.
MotorWorks handles this through the statements and credit notes feature — credit notes are linked to their original invoice, carry their own sequential number, and export cleanly for your accountant.
Electronic invoices: are they valid?
Yes. Revenue accepts electronic invoices on the same basis as paper invoices, provided they:
- Contain all the mandatory information listed above
- Are issued in a format the customer can receive and store
- Are authentic — the content must not have been altered after issue
Emailing a PDF invoice from your garage management system is fully valid. A link to an invoice in a customer portal is valid. A text message with a figure on it is not.
The key requirement is that the invoice must be stored and retrievable. Revenue can ask to see invoices going back up to six years. If your invoices are in a system you can search and export, that’s straightforward. If they’re in a folder of PDFs named “Invoice copy” on your desktop, you have a problem.
How long do you need to keep invoices?
Six years. Revenue can open an enquiry or audit going back six years, and you must be able to produce records for that entire period.
This means your invoicing system — whatever it is — must be able to retrieve invoices from six years ago. Not just the current year, not just the last two years. Six years of sequentially numbered, correctly formatted invoices, searchable by date, customer, and amount.
A cloud-based garage invoicing system keeps those records automatically. On-premise software that you or an IT person manages comes with the risk of data loss if something goes wrong with a machine.
Common invoicing mistakes Irish garages make
Based on what Revenue identifies in compliance checks and what accountants see in practice, the most common errors are:
Missing VAT number. The single most common omission. It seems obvious, but many garages have templates that don’t include it, or invoice from systems that weren’t configured with the number.
Incorrect VAT rates. Applying a single rate across all lines rather than 23% for standalone parts and 13.5% for labour and included parts.
Vague descriptions. “Repairs” or “Service” without the vehicle details. This doesn’t satisfy the description requirement and it’s not useful to anyone.
No sequential numbering. Invoice numbers that repeat, reset annually without a year prefix to differentiate them, or are issued out of sequence.
Missing customer address. Fine for a cash sale to a private customer who just wants a receipt, but not valid where a VAT invoice is required.
Credit notes issued as negative invoices. Adjusting the original invoice or issuing an invoice with a negative amount rather than a properly referenced credit note.
Not keeping records for six years. Using a system — or a filing method — that can’t reliably produce records going back six years.
How garage invoicing software handles this automatically
The reason compliance problems are so common is not that garage owners don’t care — it’s that invoicing is something you do under pressure, between jobs, at the end of a busy day. Remembering 15 mandatory fields while a customer is waiting at the desk is not realistic.
Properly built garage invoicing software removes that dependence on memory. When you generate an invoice from a job card:
- Your business name, address, and VAT number are pre-populated
- The customer’s name and address come from their record
- The description pulls from the job card — vehicle, registration, work done
- Parts and labour lines are listed with the correct VAT rate applied to each
- The sequential invoice number is assigned automatically
- The VAT amount and gross total are calculated correctly
Nothing gets forgotten because nothing gets filled in manually.
MotorWorks invoicing builds invoices directly from job cards. Every mandatory field is included by default. The correct VAT rates are applied to the right lines — 13.5% for labour, 23% for standalone parts. Sequential invoice numbering is automatic. And every invoice is stored in the system, searchable and exportable, so if Revenue comes knocking in three years’ time you can produce whatever they need in minutes. If a customer wants to view their invoices themselves, the customer portal gives them access without you needing to dig anything out.
For the financial side of your workshop more broadly — reports covering profit per job, receivables aging, and outstanding balances — the garage accounting software guide covers that in detail. And if you’re dealing with trade accounts and fleet customers, the statements and credit notes feature handles monthly statements and aged debtors in one place.
A note on Revenue e-invoicing requirements
Ireland is moving towards mandatory electronic invoicing for B2B transactions, in line with EU-wide initiatives. The timeline and requirements are still being finalised at the time of writing. What this will mean in practice is that invoices between VAT-registered businesses will need to be transmitted in a structured electronic format — not just a PDF, but machine-readable data.
This is worth watching if you have trade accounts with other VAT-registered businesses — other garages, bodyshops, fleet operators. Cloud-based invoicing systems will be better positioned to adapt to these requirements than paper-based or manual systems.
Summary: what every garage invoice must include
To keep it simple, here is the checklist for a full VAT invoice:
- The word “Invoice”
- Unique sequential invoice number
- Date of issue
- Date of supply (if different)
- Your full business name and address (including Eircode)
- Your VAT registration number
- Customer name and address
- Clear description of goods or services (including vehicle details)
- Quantity of goods or extent of services
- Unit price (excluding VAT)
- Any discounts applied
- Taxable amount at each VAT rate (23% and 13.5% listed separately if both apply)
- VAT rate(s) applied
- VAT amount payable
- Total amount due (inclusive of VAT)
If all 15 of those are on your invoices, every time, you’re compliant. If you have to think about it each time you create an invoice, you’re relying on memory in a situation where mistakes have consequences. If you want a starting point, our mechanic invoice template for Ireland has a ready-to-use layout with all the mandatory fields built in.
If you want to see how MotorWorks handles invoicing — from job card to invoice in one click, with automatic VAT rates, sequential numbering, partial payments, credit notes, and 15+ reports covering revenue, outstanding balances, and receivables aging — book a demo and we can walk you through it with your own workshop in mind. No commitment, no hard sell.
