VAT, RCT and Eircodes: a guide for Irish glaziers

The two VAT rates on glazing work, when the two-thirds rule changes the rate, how RCT and the reverse charge work for subcontractors — and why every job should carry its Eircode.

General guidance, not legal or tax advice. Last checked: October 2026.

Two VAT rates

Irish glazing work usually involves two VAT rates. Supplying and installing fixtures — construction services — is generally at the reduced rate of 13.5%. Supplying building materials on their own (glass collected or delivered, not fitted) is at the standard rate of 23%, as is scaffolding.

The two-thirds rule

On a supply-and-fit job, if the cost of the goods you use (excluding VAT) is more than two-thirds of the total VAT-exclusive price, the goods rate — 23% — applies to the whole job. That can catch a job where the glass is expensive and the fitting is quick. Note it is the cost of the goods to you, not what you charge for them. The rule doesn't apply where the RCT reverse charge applies, or between connected persons.

RCT and the VAT reverse charge

Relevant Contracts Tax applies when a principal contractor pays a subcontractor for construction work. The principal deducts RCT at 0%, 20% or 35%, depending on the subcontractor's record with Revenue, and all of it runs through Revenue Online Service (ROS).

Where RCT applies, the VAT reverse charge applies too: as the subcontractor you invoice without VAT and add the line "VAT on this supply to be accounted for by the principal contractor", and the principal accounts for the VAT. A glazier working for a builder on one job and a homeowner on the next deals with both kinds of invoice.

Eircodes on every job

Every Irish address has a seven-character Eircode: a three-character routing key for the area, and a four-character identifier unique to the address — for example A65 F4E2. On rural jobs, where several houses share a townland name, the Eircode is what gets the fitter to the right door. Take it at the enquiry and keep it with the site address.

Where Coglass fits

What Coglass does today. RCT deductions and returns are done on ROS, not in Coglass:

Want to see it on your own jobs? Book a demo or see pricing in EUR.

Sources

This page explains the rules in general terms. Standards and tax rules change, and how they apply depends on the job — check the source, your building control body or your accountant before relying on it.

More for glaziers in Ireland

Every job with the right address

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