From 5 January, wholesale milk prices will go up by 4.4% - pushing the cost of a litre over £2 in some shops.
Guernsey Dairy says the price increase aligns with the Retail Prices Index (RPIX) measure of inflation.
In a statement, the Dairy says the price increase reflects the rising costs it's facing and the ongoing need for investments in the critical infrastructure there.
The 4.4% wholesale price increase will be felt primarily by retailers, who then determine the final price paid by consumers.
Chairman of the Dairy Management Board, Mark Thompson, said every effort was being made to contain increases, but rising costs inevitably had to be passed on to customers.
The price of milk at shops across Guernsey varies - with some recently selling a litre for as low as £1.75 with others selling for above £1.90.
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