Council tax in will rise by 3.99 per cent in April after a full meeting of Cornwall Council accepted the cabinet's budget proposals.
It means those living in a Band B property will pay an extra 88p a week for a budget designed to protect vital frontline services for the most vulnerable residents in Cornwall.
Proposals for a business plan for the Duchy, including investments in Hayle Harbour and Torpoint, aimed at helping ensure a strong economy post Brexit, were also approved by the full council.
The proposals were debated at New County Hall in Truro on Tuesday, with three alternative budget amendments also scrutinised and debated by councillors.
One amendment, which will see funding taken from reserves and spent on children’s public health services, was approved by 54 votes to 53 votes with three abstentions.
The cabinet's budget, with the single amendment, was then carried unanimously by the full council.
Over 80,000 residents had their say on the budget during the community consultation helping to develop the final proposals. which included:
Deputy leader of Cornwall Council and cabinet portfolio holder for resources Julian German said setting the council’s budget and council tax for 2019/20 and planning for the years beyond was more challenging than ever.
He said: “In an era of such uncertainty, and ever-decreasing funding from central Government, it is a challenging task to produce a budget.
“However, I am delighted that we have produced a plan which will both protect the most vulnerable members of society and will help us to build a prosperous and sustainable economy for Cornwall.”