What the 231 and 232 plate system does to your car's value

Ireland is one of the few countries where the year is printed on the number plate in large figures, and one of fewer still where it changes twice a year. Both of those facts are worth money — to you when you sell, and against you if you sell at the wrong end of a half.

How the plate reads

An Irish plate runs year — county — sequence: 231-D-12345.

Since 2013 the year field has three digits instead of two. The first two are the year, and the third says which half of it the car was registered in:

• 231 — registered between January and June 2023
• 232 — registered between July and December 2023
• 241, 242 — the same for 2024, and so on

Before 2013 it was simply 12-D-12345 for 2012. The change was made partly because nobody in the trade fancied selling a country full of 13-plates, and mainly to do something about January.

The middle letter is the county the car was first registered in — D for Dublin, C for Cork, G for Galway, L for Limerick, T for Tipperary since the two ridings were merged in 2014, and so on down the list.

Why the split exists

Before it, effectively every new car in Ireland was registered in January. Buyers waited for the new plate, the trade sold a year's worth of cars in a few weeks, and factories, transporters, dealers and finance houses all dealt with one enormous spike and eleven quiet months.

Splitting the year gave the market two selling seasons instead of one. It worked. January is still the bigger of the two, but July is now a genuine second peak — and that second peak is the part most private sellers never think about.

What it does to your car's value

A half-year is worth more than the months in it. A car registered in June 2023 wears a 231 plate. The same car registered in July wears a 232. They are weeks apart in age and a plate apart in every advertisement either of them will ever appear in. The 232 will be worth more, for as long as both cars exist.

The drop happens on a date, not gradually. Your 241 does not slide quietly downhill. It is a current plate until the 242s arrive in July, and then it is last half's car. The same thing happens again each January. Value comes off in steps, on the first of the month, twice a year.

Which puts a deadline on selling. Broadly:

And a mirror image if you are buying. The weeks just after each changeover are when the trade-ins from the new-car deals hit the forecourts. That is the best used stock of the year, and it is why a patient buyer waits until late January or late July rather than shopping in December.

The practical version

• If you are within a few weeks of a changeover, move now, not after. A car sold in the last days of June is a 231 sold while 231 still means something. Three weeks later it is a car from the half before last.
• If you are buying new and know you will change again, the second half is kinder. A 242 registered in July stays current for six months and then reads as a 2024 car — the same as a 241 that was already six months old when you got it.
• Do not chase the plate on a car you keep for a decade. By year eight, nobody is counting halves. The plate premium is a first-five-years phenomenon; after that, NCT, mileage and condition are the whole story.
• County letters barely matter. A D plate on a car in Kerry raises an eyebrow and nothing else. Buyers care about it far less than sellers imagine.

Where you actually sit

The plate sets the frame. What fills it in is your car's mileage, its NCT and its history — see what NCT and mileage do to what a dealer will pay and how much a car depreciates in Ireland.

If a changeover is coming and you want to know whether it is worth moving before it, ask what your car is worth. Irish dealers come back with real offers, usually inside 24 to 72 hours, free and with no obligation — which is the only reliable way to find out what a few weeks are worth on your particular car.