6 million euro has been collected over the past 48 hours - bringing the total compliance rate to 88 per cent.
Those who haven't paid are being warned that they could be brought before the courts.
A last-minute scramble to pay the property tax is expected today ahead of midnight's deadline.
Interest will kick-in immediately once the deadline passes - as the Revenue puts its compliance programme in action.
Officials say tougher penalties await those who continue to ignore the ultimatum - including deduction from wages, referral of the debt to a Sheriff or Solicitor - and the prospect of being brought before the courts.
Those who deliberately undervalue their home will also be under scrutiny - 2-thousand have already owned up to under-declaring since November.
And there's also expected to be a surge in the number paying arrears on their 2012 household charge - with 2-thousand payments made in the last couple of days.