Unemployed and self-employed islanders can opt to have their social security contributions based on their 2020 income if they're worse off because of the coronavirus pandemic.
Revenue Service is offering the switch to those whose earnings have dropped significantly.
People who work for themselves, or not at all have the option of having their social security contributions based on current year income, rather than on the two previous years.
The change is due to be made for everyone next year - to align deductions with Income Tax.
But it has been brought forward for those whose finances are less than in 2018 because of the pandemic.
Those affected are being written to with details of their new lower rate.

WATCH: Last Blue Islands plane leaves Jersey
New woodland for Alderney's 80th Homecoming
Guernsey States 'in talks' with easyJet
Guernsey's airline Aurigny takes on six new First Officers
Call for more transparency over Guernsey Electricity's charges
Guernsey Police investigate 'unexplained death' in St Peter Port
Senior Guernsey politician to stay on committee during police investigation
Iconic Guernsey restaurant to close before Christmas