RCT for Subcontractors: What You Need to Know

What Is Relevant Contracts Tax (RCT)?

Relevant Contracts Tax is a withholding tax system operated by Revenue that applies to payments made in the construction, forestry, and meat processing industries in Ireland. If you're a subcontractor working in construction — and most tradespeople are at some point — RCT affects you.

Here's the basic idea: when a principal contractor pays a subcontractor, they don't pay the full amount. Instead, they deduct RCT at a set rate and send that deduction directly to Revenue. It's similar to how PAYE works for employees, except it applies to self-employed subcontractors and companies.

Why Does RCT Exist?

Revenue introduced RCT to tackle tax evasion in the construction sector. Before RCT, it was common for subcontractors to receive cash payments and not declare all their income. RCT ensures that a portion of every payment is automatically sent to Revenue — so even if someone "forgets" to file their return, Revenue already has some of the tax owed.

For compliant subcontractors, RCT shouldn't cost you anything extra. The tax deducted is offset against your income tax or corporation tax liability. Think of it as tax you'd owe anyway, just collected at source.

Who Needs to Register for RCT?

You Need RCT Registration If:

• You're a subcontractor doing construction work (including plumbing, electrical, plastering, painting, roofing, carpentry, tiling, and most trades)
• You're being paid by a principal contractor (not directly by a homeowner)
• The work is carried out in the State (Republic of Ireland)

You're a "Principal Contractor" If:

• You're a builder or developer who hires subcontractors
• You're a local authority, government body, or state agency
• You're any business that spends more than €10,000 on construction operations in any 12-month period

Important: Many tradespeople are both. If you hire a subbie to help on a job, you're a principal contractor for that payment. If a main contractor hires you, you're the subcontractor. You can be registered as both simultaneously.

What Counts as "Construction Operations"?

Revenue defines this broadly. It includes:

• Building, demolition, or dismantling of structures
• Civil engineering works
• Installation of heating, lighting, power, drainage, or ventilation systems
• Plastering, painting, decorating
• Roofing (including repairs)
• Site clearance, earth moving, laying foundations
• Road building and maintenance

If you're a tradesperson doing any of the above for another business, RCT almost certainly applies.

When RCT Does NOT Apply

• Homeowner hiring you directly — if Mrs. Murphy hires you to do her bathroom, RCT doesn't apply (she's not a principal contractor)
• Employee relationships — if you're on payroll, PAYE applies instead
• Supply-only contracts — if you're just selling materials without installation, RCT doesn't apply
• Professional services only — architects, engineers, and surveyors providing design services (not construction) are typically excluded

The Three RCT Rates

When a principal contractor notifies Revenue about a payment to you, Revenue checks your record and assigns one of three rates:

0% — The Best Rate

You get paid the full amount with no deductions.

To qualify, you typically need:

• A good tax compliance record
• All tax returns filed on time
• All tax liabilities paid or agreed
• Registered for at least three years
• A pattern of receiving payments in the construction sector

This is what you're aiming for. It means Revenue trusts you to handle your own tax affairs.

20% — The Standard Rate

The principal contractor deducts 20% from your payment and sends it to Revenue.

This applies when:

• You're registered for tax but don't meet all the 0% criteria
• You have minor compliance issues
• You're relatively new to the system

Example: You invoice a main contractor for €5,000. They deduct €1,000 (20%) and pay you €4,000. The €1,000 goes to Revenue and is credited against your tax bill.

35% — The Penalty Rate

The principal contractor deducts 35% from your payment.

This applies when:

• You're not registered for tax in Ireland
• You have serious compliance issues
• Revenue can't verify your identity
• The principal contractor didn't notify Revenue before making the payment

Example: You invoice for €5,000. They deduct €1,750 and pay you €3,250. That stings.

How to Check Your Rate

You can check your RCT rate through Revenue's Online Service (ROS). Your principal contractor will also be told your rate when they submit a Contract Notification.

How to Register for RCT

Step 1: Register for Tax

If you're not already registered as self-employed or as a company with Revenue, do that first. You'll need:

• Your PPS number (Personal Public Service Number)
• To register for Income Tax (Form TR1) or Corporation Tax (Form TR2)
• To register for VAT if your turnover exceeds the threshold

Step 2: Register for RCT

RCT registration is done through ROS (Revenue Online Service) at www.ros.ie.

1. Log into ROS with your digital certificate
2. Go to "Manage My Record"
3. Select "Manage Registrations"
4. Add RCT as a subcontractor (and/or principal contractor if applicable)

Step 3: Provide Bank Details

Revenue needs your bank details to process any refunds owed to you. Make sure your bank account details are up to date on ROS.

Step 4: Stay Compliant

To maintain or improve your RCT rate:

• File all tax returns on time — Income Tax, VAT, Employer returns
• Pay all liabilities on time — or agree a phased payment arrangement
• Keep records — Revenue can audit you, and good records protect you
• Respond to Revenue correspondence — ignoring letters is the fastest way to a 35% rate

How the RCT Process Works (Step by Step)

Here's what happens for every RCT payment:

1. Contract Notification

The principal contractor notifies Revenue about the contract with you. They do this through ROS before the first payment.

2. Payment Notification

Before each payment, the principal contractor submits a Payment Notification to Revenue. Revenue responds with your applicable rate (0%, 20%, or 35%).

3. Deduction Summary

The principal contractor provides you with a Deduction Summary showing how much was deducted. Keep these — you'll need them when filing your tax return.

4. Credit Against Your Tax

The RCT deducted is credited to your Revenue account. When you file your annual tax return, these credits reduce what you owe. If more was deducted than you owe, you get a refund.

Common RCT Mistakes to Avoid

1. Not Registering at All

If you're not registered, principal contractors must deduct at 35%. That's a third of your payment gone at source. Register and get compliant.

2. Ignoring Your Rate

If you're on 20% but could be on 0%, you're giving Revenue an interest-free loan. Check your rate regularly and fix any compliance issues.

3. Not Keeping Deduction Summaries

Without Deduction Summaries, you can't prove how much RCT was deducted. You need these to claim your credits.

4. Missing Filing Deadlines

One late return can bump you from 0% to 20%. Revenue's system is automated — it doesn't care that you were on holiday.

5. Not Separating Labour and Materials

RCT applies to the full payment (labour + materials) unless the contract clearly separates them and the materials element is a genuine supply. Get advice on how your contracts should be structured.

How TradeTime Handles RCT Automatically

RCT compliance means extra admin on every single payment. For busy tradespeople, that's a headache you don't need.

TradeTime was built with the Irish market in mind, and RCT support is baked in:

• Flag jobs as RCT-applicable when creating them
• Automatically calculate deductions at your current rate on invoices
• Generate RCT-compliant invoices that show the correct deduction
• Track all deductions across jobs so you (or your accountant) have a clear record at year-end
• Store Deduction Summaries against each job for easy reference

Instead of juggling spreadsheets and trying to remember which jobs need RCT applied, TradeTime handles it for you — so you can focus on the work.

RCT and VAT: How They Interact

A common question: does RCT apply before or after VAT?

RCT is calculated on the VAT-exclusive amount. VAT is charged separately. So if you invoice €5,000 + €675 VAT (at 13.5%), the RCT deduction applies to the €5,000, not the €5,675.

If reverse charge VAT applies (which it does for most B2B construction services), VAT isn't charged on the invoice at all — it's accounted for by the principal contractor. In that case, RCT applies to the full invoice amount.

This is where it gets complicated, and it's another reason to use software that handles both VAT and RCT together.

Key Takeaways

1. RCT applies to most construction subcontractors in Ireland — if you're a tradesperson working for contractors, you need to be registered
2. Three rates: 0%, 20%, 35% — compliance gets you to 0%
3. Register through ROS and keep all your tax affairs in order
4. Keep every Deduction Summary — you'll need them at tax time
5. RCT deductions aren't lost — they're credited against your tax bill
6. Use software that understands RCT — it saves hours of admin and prevents costly mistakes

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Take the Pain Out of RCT

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