Ireland RCT Invoice Requirements: eRCT Workflow Guide

Ireland RCT invoice requirements make more sense once you split the supplier's invoice from Revenue's eRCT paperwork. The subcontractor's invoice is the commercial document for the work supplied. It should contain the usual invoice details, but where Irish construction services fall under reverse charge, the subcontractor should not show a VAT rate or VAT amount and should include wording such as "VAT on this supply to be accounted for by the Principal Contractor." The RCT deduction itself does not belong on the invoice. Before each payment, the principal submits a payment notification through eRCT, receives a deduction authorisation showing the RCT rate and amount to withhold, and then pays the subcontractor net of that deduction.

For most readers, the key operational point is this: an invoice can be correct while the payment still cannot be made until the Revenue side of the process is complete. That is why the invoice and the deduction authorisation need to be read together, but never confused.

Document question	Put it on the subcontractor invoice?	Where it appears instead
Supplier and customer names, invoice number, date, description of work, values	Yes	On the invoice itself
Construction reverse-charge wording	Yes, where reverse charge applies	On the invoice itself
VAT rate and VAT amount for reverse-charge construction services	No	The principal accounts for VAT in its own VAT return
RCT rate of 0%, 20%, or 35%	No	Revenue deduction authorisation
RCT amount to withhold from the payment	No	Revenue deduction authorisation
Confirmation that the principal can make the payment	No	Revenue payment notification and deduction authorisation trail

If you are reviewing an RCT subcontractor invoice in Ireland, use a short check. Confirm that the normal invoice fields are present. Confirm that reverse-charge wording is included for qualifying construction work. Confirm that VAT has not been charged on the face of that invoice where reverse charge applies. Then move to the eRCT records to verify the payment notification and deduction authorisation before money leaves the business.

---

When RCT Applies and Which Sectors It Covers

Relevant Contracts Tax is Ireland's withholding tax regime for certain payments from a principal to a subcontractor. Revenue decides which deduction rate applies, and the principal withholds that amount from the payment before remitting it through the tax system. In practice, that means the invoice is only one document in a wider compliance chain.

RCT applies in three sectors:

• Construction, including building, demolition, installation, groundwork, labour-only arrangements, and other construction-related services
• Forestry operations
• Meat processing

Construction gets most of the attention in invoice-format guidance because it is the area where RCT often intersects with reverse-charge VAT. Forestry and meat processing can still fall within RCT, but they do not create the same day-to-day invoice-format questions as often as construction jobs do.

It also helps to keep the parties straight. The principal contractor is the business paying for the work. The subcontractor is the party carrying it out and issuing the invoice. Revenue Commissioners administer the system through the Revenue Online Service, and that administrative layer matters because RCT is not handled informally or after the fact. The parties are expected to work through an electronic process that links contract setup, payment approval, deduction calculation, and record retention.

That is why scope and invoice requirements should be treated as related but separate questions. A contract can fall within RCT because of the sector and the relationship between the parties. The invoice-format changes, especially around VAT wording and omitted VAT figures, arise mainly from the construction reverse-charge rules. Keeping those two ideas separate prevents a lot of avoidable confusion later in the workflow.

How Construction Reverse-Charge VAT Changes the Invoice

For Irish construction services covered by reverse charge, the subcontractor's invoice still looks like a normal business invoice in most respects. You still expect the supplier and customer details, invoice date, invoice number, description of the work, and the values needed to understand what is being billed. What changes is the VAT presentation. The subcontractor should not add a VAT rate or VAT amount to the invoice for that reverse-charge supply. Instead, the invoice should make clear that the principal contractor accounts for the VAT.

This point is stated directly in Revenue's construction-services VAT guidance for principal contractor invoices: for construction services covered by the reverse charge, the subcontractor invoice includes the normal VAT invoice information except the VAT rate and VAT amount, and it must carry the principal-contractor reverse-charge statement. In practice, many businesses use wording such as "VAT on this supply to be accounted for by the Principal Contractor" so the treatment is clear when the invoice is reviewed by AP, bookkeeping, and tax teams. Teams working across EU construction markets often keep a separate checklist for Finland's reverse-charge construction invoice requirements, where buyer Business ID validation and contractor-reporting data points are more central to the invoice review.

What should not happen is just as important. The RCT deduction rate does not replace the VAT treatment, and it does not belong on the invoice as if it were part of the sales calculation. RCT is a withholding applied to the payment through Revenue's authorisation process. Reverse charge is a VAT treatment affecting how the construction supply is shown on the invoice.

The two-thirds rule adds another layer. If materials exceed two thirds of the VAT-exclusive value of the job, the whole supply moves to the higher VAT rate instead of the lower construction rate. That does not mean the subcontractor suddenly starts showing VAT on a reverse-charge invoice. It means the parties need to classify the underlying supply correctly so the principal accounts for the right VAT treatment. Readers who work across jurisdictions may find it useful to compare this with Portugal's construction reverse-charge invoice rules in another EU market, but the Irish RCT payment process remains its own system.

---

The eRCT Workflow From Contract Notification to Net Payment

Once the invoice is drafted correctly, the Irish eRCT workflow determines whether and how payment can actually be made. The cleanest way to understand the process is to track the documents in order.

1. Contract notification: The principal notifies Revenue about the contract through the Revenue Online Service. Where relevant, the setup includes a Site Identifier Number so Revenue can tie the activity to the project.
2. Invoice received: The subcontractor issues the invoice for the work completed. This is the commercial billing document, not the tax authorisation.
3. Payment notification: Before each payment, the principal sends a payment notification through eRCT. This step happens for each payment event, not just once when the contract starts.
4. Deduction authorisation: Revenue responds with the deduction authorisation showing the RCT rate and the amount to withhold from that payment.
5. Net payment and withholding: The principal pays the subcontractor the net amount and accounts for the withheld RCT as required.
6. Records retained: The parties keep the invoice, notification trail, deduction authorisation, and payment evidence aligned for later review.

That sequence matters because each document answers a different question. The invoice tells you what was supplied and what amount is being billed. The contract notification tells Revenue that the relevant relationship exists. The payment notification tells Revenue a payment is about to be made. The deduction authorisation tells the principal what must be withheld on that payment. None of those documents can safely stand in for another.

For AP teams and bookkeepers, the practical control is straightforward: do not approve payment just because the invoice looks correct. Match the invoice to the contract details, check that the payment notification has been filed, confirm the deduction authorisation has been issued, and only then release the net payment. That document-chain view is where most fragmented RCT guidance falls short.

What the 0%, 20%, and 35% RCT Rates Mean in Practice

The 0%, 20%, and 35% RCT rates are payment outcomes, not invoice lines. They affect how much cash the subcontractor receives after Revenue's deduction is applied, but they do not change the underlying invoice content in the way reverse-charge VAT does.

RCT rate	What it usually signals in practice	Operational effect
0%	The subcontractor is registered and sufficiently compliant	The principal can pay the full invoiced amount, subject to any non-RCT adjustments
20%	The standard rate for a subcontractor known to Revenue but not qualifying for 0%	The principal withholds 20% of the payment value authorised by Revenue
35%	High-risk or non-compliant status, or an issue with setup	The principal withholds 35%, creating the largest gap between invoice value and cash paid

The deduction rate comes from Revenue and is shown in the deduction authorisation linked to the payment notification. That is why invoice reviewers should resist the temptation to treat the rate as something the subcontractor should print on the invoice. If the invoice shows a gross amount for work done and the deduction authorisation later instructs a 20% or 35% withholding, the correct response is not to rewrite the invoice. It is to reconcile the documents properly.

In practice, that reconciliation means checking three figures every time: the gross invoice value, the RCT deduction authorised by Revenue, and the net amount actually paid. If those values do not line up, the problem usually sits in one of three places, an incorrect payment notification, a misunderstanding of what the deduction authorisation covers, or weak record matching between the commercial invoice and the tax workflow.

The 35% rate deserves special attention because it often appears when the subcontractor is not set up cleanly in the system or Revenue has treated the position as non-compliant. From a controls perspective, that should trigger review, not improvisation. The rate still belongs in the Revenue record, not on the invoice itself.

---

Record Matching, Penalties, and Common Mistakes to Avoid

Most RCT problems are not caused by one bad document. They come from documents that do not match. A defensible file should let you trace the job from contract setup to invoice, from invoice to payment notification, from payment notification to deduction authorisation, and from deduction authorisation to the bank payment. If any link in that chain is missing, the business is exposed.

The most common mistakes are predictable:

• Charging VAT on a construction invoice when reverse charge should apply
• Treating the deduction authorisation as if it were the invoice
• Paying before Revenue has issued the deduction authorisation for that payment
• Keeping the invoice but not the matching payment-notification and deduction records
• Forgetting that materials-heavy work can change the VAT analysis through the two-thirds rule

The penalties can be severe enough to justify a formal control process. Paying without a deduction authorisation can push the transaction to the 35% RCT rate and expose the payer to a penalty of up to EUR 5,000. Civil penalties for failing to deduct correctly can also apply at 3% where a 0% rate should have applied, 10% where a 20% rate should have applied, and 20% where a 35% rate should have applied. Separate invoice-compliance failures can create their own exposure as well, including a EUR 4,000 fixed penalty for invoicing non-compliance, so it is worth treating the invoice review and the eRCT review as one joined workflow.

If your team already knows UK construction withholding, compare this topic with how the UK's CIS deductions and reverse-charge rules compare with Ireland's RCT model before assuming the steps are interchangeable. The systems solve a similar risk problem, but Ireland's per-payment eRCT authorisation flow is different. It is also worth separating current RCT practice from Ireland's separate 2028 e-invoicing and Peppol preparation timeline, which is a different compliance project.

Use this final control list before closing the file:

• Confirm the invoice contains the standard billing details
• Confirm reverse-charge wording is present where construction reverse charge applies
• Confirm VAT rate and VAT amount are omitted from the subcontractor invoice for that reverse-charge supply
• Confirm the payment notification and deduction authorisation exist for the payment being made
• Confirm the authorised deduction matches the net payment actually released
• Retain the invoice, Revenue records, and payment evidence together