📐 Price Increase Calculator
How big is that increase, really?
Price rises arrive in the currency that makes them look smallest — a few euro a month, a percentage with no amount attached. This converts between the two and shows what it costs over a year, which is the figure worth reacting to.
Figures reviewed September 2026. Free, no signup, nothing stored on our servers.
What this means
Both numbers matter and they are used to hide different things. A percentage hides the amount: 4% of a €2,000 rent is €960 a year. An amount hides the proportion: “just €3 a month” on a €9 subscription is a third.
The annual figure is almost always the one that changes behaviour. Nobody cancels over €5 a month; people do cancel over €60 a year for something they use twice.
What affects the result
- Whether the comparison is like for like — a promotional rate ending is not the same as a price increase.
- Whether the old price included a discount that had an end date you agreed to.
- How often the price is paid. A weekly increase is more than four times a monthly one.
- Whether the increase is contractual or requires notice. Rent and regulated services both have rules.
How big is that increase, really?
What to do with the number
If it is a rent increase, check it against the RTB rules before agreeing to anything. If it is a utility, switching supplier usually beats negotiating. If it is a subscription, the annual figure is the argument for cancelling. And if you want to see where every one of these sits against the rest of your outgoings, the Money Leak Checker ranks them.
Important assumptions
Every figure on this page rests on these. Where one does not match your situation, the answer moves — sometimes a great deal.
- A straight comparison between the two figures entered, with no adjustment for what is included at each price.
- The "years of 2% inflation" line compares a single increase with general price growth. It is context, not a judgement about whether the increase is justified.
Official sources
Where this tool applies a published rule, this is where the rule comes from. Check the source before acting on anything that matters.
- CSO — Consumer Price Index
Official Irish inflation figures, for judging an increase against what prices generally have done.
- RTB — rent setting and Rent Pressure Zones
The legal limits on rent increases in Rent Pressure Zones and the notice a landlord must give.
Common questions
How do I work out a percentage increase?
Subtract the old price from the new one, divide by the old price, and multiply by 100. An increase from €1,800 to €1,950 is 150 ÷ 1,800 × 100, which is 8.3%.
Is my rent increase legal?
In a Rent Pressure Zone there is a statutory cap on the amount and a minimum interval between increases, and the notice must be in a prescribed form. The rent increase checker applies the current RTB rules to your own figures.
Can a provider increase a price mid-contract?
It depends on the contract. Many Irish telecoms and subscription contracts contain a price variation clause, and where one applies you are often entitled to exit without penalty if the increase is material. ComReg sets out the position for telecoms.
What to check next
Is this rent increase legal?
Check a proposed increase against Rent Pressure Zone rules and RTB notice periods.
Rent Increase CheckerPopularAm I paying too much for electricity?
Compare Irish electricity and gas tariffs on net first-year cost, not headline rate.
Energy Switch ComparisonNewWhere is my money actually going?
Add up every recurring household cost and see which categories are worth attacking first.
Money Leak CheckerWhat does living here actually cost?
A monthly household budget built from typical Irish costs by county and household size.
Cost of LivingNext steps across CheckIreland
Picked for what you just worked out — not a list of everything we make.
CheckIreland is independent and is not affiliated with the Irish Government or any public body. This tool is general information built on published rules and typical costs — it is not financial, tax or legal advice, and it does not account for your individual circumstances. Confirm anything that matters with the relevant body or a qualified adviser before acting on it.