VAT on 100 euro: what you actually pay at each Irish rate
Put 100 net through Ireland’s two main VAT rates and the receipts land differently: 123 at the standard 23% rate, 113.50 at the reduced 13.5% rate. Same starting amount, two different totals, because VAT is added as a percentage of the net figure, not subtracted from a fixed pot.
The arithmetic
VAT is calculated by multiplying the net amount by the rate, then adding that to the net to get the gross (the “gross” is what actually gets paid, VAT included).
At the standard rate:
- Net: €100
- VAT (23% of €100): €23
- Gross: €123
At the reduced rate:
- Net: €100
- VAT (13.5% of €100): €13.50
- Gross: €113.50
The gap between the two receipts, €9.50, is entirely down to which rate applies to the transaction, not any difference in the underlying price.
Reading a receipt backwards
Here’s the useful check: does the maths run the other way too? Take the gross figure of €123 and ask how much VAT is sitting inside it. The answer is exactly €23, and the net comes back out at €100.
That round trip matters because it proves the relationship is consistent in both directions. You can start from what a customer paid and recover what the business charged before VAT, or start from the net price and work out what the customer will be asked to pay. Same numbers, same rate, either direction.
Scale it
The relationship holds at any size, not just €100. Take a gross amount of €500.
At 23%: the VAT inside that €500 is €93.50, and the net is €406.50.
At 13.5%: the VAT inside that €500 is €59.47, and the net is €440.53.
Notice the net and VAT split changes with the rate, but they always add back to the gross you started with. That’s the property worth checking whenever you’re handed a VAT-inclusive figure and need to know what portion is tax.
Try your own numbers
The trap is doing this by hand and taking a shortcut: subtracting 23% straight off a gross figure. Applying that to €123 gives €94.71, not €100. The rate applies to the net, not the gross, so subtracting it from the gross overshoots. Extracting VAT from a gross figure needs a different calculation to adding it to a net one — they are not mirror-image subtractions.
Ireland’s VAT rates, as of this review (Revenue, effective 1 January 2026), are: standard 23%, reduced 13.5%, second reduced 9%, and two further rates that are agricultural by name — livestock at 4.8% and flat-rate farmers at 4.5%. Which goods and services fall under which rate is set out in Revenue’s own rates database, and it changes at budgets, so treat any specific rate as current as of this page’s review rather than fixed permanently.