Monaghan County Council has voted to increase the Local Property Tax by 15 per cent.
The motion was passed by 12 votes to 6, after a lengthy debate.
Each year, every local authority in Ireland has a decision whether to vary the Local Property Tax by plus or minus 15 per cent.
The adjustment is used to support a discretionary Municipal Allocation which goes towards matched funding for local projects in the three MDs.
Last year, the 15 per cent increase equalled an allocation of €333,000 per area.
Cathaoirleach of the council, Sinn Fein's Colm Carthy said the rate should be left unchanged.
The party is opposed to the tax and normally proposes a 7.5 per cent decrease as a compromise, but said having no change would be beneficial to households while maintaining a discretionary budget.
This was countered by Fianna Fail's PJ O'Hanlon who said the "popular decision isn't always right", but listed a number of projects that he said couldn't have went ahead without previous increases.
The rate resets each year, meaning a 15 per cent increase would keep it level with what was paid last year.
Fine Gael members Aidan Campbell, David Maxwell and Sean Gilliland acknowledged they'll be "slated" on social media for supporting an increase, but can stand over where the money goes to.
Seamus Coyle, Richard Truell and Paudge Connolly also voiced support.
Pat Treanor, Brian McKenna, Sean Conlon and Noel Keelan spoke in favour of Sinn Fein's proposal and their opposition to the tax.
Chief Executive of Monaghan County Council Eamonn O'Sullivan agreed Local Government funding isn't perfect but the LPT is law and that to continue progress seen the county, an baseline increase would be needed.
PJ O'Hanlon's motion was passed by 12 to 6, with Fine Gael, Fianna Fail and Independent members in support, and Sinn Fein members against.