Microsoft is raising prices of volume licences for several of its major product categories for businesses in the UK, bringing charges in line with the rest of Europe.
The firm confirmed that customers entering into new Enterprise Agreements will see an average price rises of 25 per cent with Office 365 online services to increase by 21 per cent.
The biggest rises will take place around its Open Value, Service Provider, and Independent Software Vendor agreements, set to rise by 33.5 per cent, while its Open Licence Agreements will increase 7.5 per cent.
Lastly, Select and Select Plus agreements will go up by 24.6 per cent.
Scott Dodds, Microsoft's UK general manager of marketing and operations, said the rise was necessary to bring the pricing of the products in line with the rest of Europe.
"Because of sustained currency differences between European countries, Microsoft is taking action to establish and maintain price consistency in the region for our volume licensing programmes."
The price rises would come in to effect from 1 July, he added.
Dodds also confirmed that the price changes would not apply to Windows, Office or other products sold to consumers through retailers or pre-installed on PCs while academic on-premise pricing would remain discounted.
"Public Sector, Health and Charities Volume Licensing Programs will continue to be supported by the current Government Framework, PSA09 which has been extended until 30 June 2012," he added.
This should ensure the public sector avoids the price hike for the time being.
Microsoft first confirmed the price rises would be brought in earlier this year and commenting at the time Forrester analyst Duncan Jones said while it may frustrate UK customers the increase was "reasonable".
"There is no good reason why UK customers should pay less than their European neighbours. It is unfortunate [UK customers] will see a significant rise, but it's merely an undeserved advantage disappearing," he wrote in a blog post.
"UK customers should blame our weak currency, rather than Microsoft, for the increase. Moreover, Microsoft has given plenty of warning so UK companies can pre-empt the increase."
Why does Facebook store "my entire call history with my partner's mum", asks developer who requested his Facebook data
Facebook database included text-message metadata - despite not using Facebook Messenger for SMS
Before Ocado could start selling the technology it had developed to other retailers, it had to tear down and rebuild its own monolithic architecture
Successful attack could result in harm to patients and financial loss, warns NHS governing body
Guccifer 2.0 claimed to be a lone Romanian hacker - until a schoolboy error gave him, her or them away