RCT Compliance Guide for Irish Contractors in 2026: Rates, Records & Revenue Audits

If you hire subcontractors in Ireland’s construction, forestry, or meat-processing sectors, you’re a principal contractor under the Relevant Contracts Tax (RCT) system. That means you must notify Revenue before every subcontractor payment and deduct tax at the correct rate. Get it wrong, and you’re personally liable for the underpaid tax.

How RCT Rates Work in 2026

Revenue assigns one of three deduction rates to each subcontractor based on their compliance history:

• 0% (zero rate) — Sub is fully tax-compliant, has filed all returns, and has been registered for at least 3 years. This is the goal.
• 20% (standard rate) — Sub is registered with Revenue and generally compliant, but hasn’t qualified for zero rate yet.
• 35% (higher rate) — Sub is non-compliant, unregistered, or unknown to Revenue. This is the default for new or problematic subcontractors.

As a principal contractor, you must check the rate via Revenue’s eRCT system before making each payment. If you pay at the wrong rate, you owe the difference.

The Payment Notification Process

For every subcontractor payment, you must:

1. Submit a payment notification to Revenue via ROS (Revenue Online Service) before or at the time of payment
2. Revenue returns a deduction authorisation confirming the rate
3. Deduct the correct amount and pay the net to the sub
4. File a return of payments by the 23rd of the following month

Failure to submit payment notifications can result in penalties of €4,000 per return period, plus interest on underpaid tax.

Documents You Need for Every Sub

Beyond RCT notifications, responsible principal contractors should collect and track:

• Tax Clearance Certificate — Confirms the sub is tax-compliant. Valid for 12 months. Required for public-sector contracts and best practice for private-sector.
• Employers’ Liability Insurance — Mandatory if the sub has employees. Covers workplace injuries.
• Public Liability Insurance — Covers third-party injury or property damage. Most head contractors require this.
• Safe Pass card — Mandatory H&S awareness training for construction workers. Valid for 4 years.
• CSCS card — Construction Skills Certification Scheme for specific trades (scaffolding, roofing, etc.).
• Company registration (CRO) — Confirms the sub is a registered business entity.

Revenue Audits: What to Expect

Revenue has increased RCT audits significantly. During an audit, they’ll check:

• That you submitted payment notifications for every subcontractor payment
• That you deducted at the correct rate (as per the deduction authorisation)
• That returns were filed on time each month
• That your records match what Revenue has on file

If discrepancies are found, you’re liable for the underpaid tax plus interest (currently 8% per annum) and potential penalties.

Common Mistakes That Trigger the 35% Rate

• Paying a new sub before they’ve registered with Revenue for RCT
• Not checking the rate before each payment (rates can change)
• Missing the monthly return filing deadline
• Sub’s tax affairs falling into arrears (their rate goes up, affecting your cash flow)

How VendorProof Helps Irish Contractors

VendorProof doesn’t replace Revenue’s eRCT system, but it solves the document management problem that surrounds it. For each subcontractor, you can:

• Store their Tax Clearance Certificate, insurance certs, Safe Pass, and CSCS cards
• Track expiry dates with automated reminders (30, 14, and 7 days before expiry)
• Send self-service upload links so subs can upload their own documents
• Maintain an audit log that shows exactly when each document was collected and verified

Free for up to 10 subcontractors. No credit card required. Get started here.