The board voted to lower its tax rate on Tuesday, however, Jefferson County Public Schools will still make more money.
The state's $1 billion budget surplus triggers a half-point reduction in income tax.
The school board set real and personal property tax rates at 73.6 cents per $100 in property value, up from 72.5 cents per $100 last year.
The union representing Louisville Metro EMS workers argues that the outlying suburban fire districts are violating Kentucky law by taxing residents too much for ambulance service
The board voted 7-0 to raise the tax rate from 70.4 cents per $100 of assessed value to 72.5 cents per $100 of property value, meaning someone who owns a $100,000 home will pay $21 more in taxes this year toward Jefferson County Public Schools.