Douglas Council says the amount of unpaid rates at the end of the financial year was more than twice the previous year's figure.
A report to the local authority's executive committee revealed 99.3 per cent of rates were paid on time last year, down 0.2 per cent.
In total, £348,033 was outstanding - well up on the previous year's £148,546.
The report from the council's director of finance also said there was £472,171 in outstanding sundry debts - up from £139,476 the year before.
Onchan's Manx signs won't wait for government advice
Onchan commissioners say they'll press ahead with putting Manx names on road signs - despite a lack of advice from government.
Farmer hits out after hay bale arson attack
A farmer's hit out after someone tried to set hay bales on fire in their fields.
Injured Manx S100 rider released from hospital
The family of a Manx rider involved in a serious crash at the Southern 100 say he's been released from hospital.
King praises Island's beauty during Tynwald address
King Charles has addressed the Island's parliament in his first stop of today's royal visit.
King Charles has arrived at Tynwald, in his first visit to the Island as monarch.
Government public counters closed because of king's visit
The government says public counters at its main offices in the capital will be closed today.
Reduced MER service as Island braces for King's visit
The Manx Electric Railway says it's running a reduced service today.
Public Health issues advice on staying cool in heatwave
Public Health has shared advice on how to keep cool during the summer heatwave.
