If they top up when they pay their final instalment of provisional tax on 28 July, they will be charged use of money interest at 8.4 percent from the date of underpayment until 28 July.
Purchasing the underpaid tax for 28 November, 2013 and 28 March, 2014 now will immediately reduce this interest cost to 6.08 percent (5.58 percent for corporate members).
Tax Management NZ has a plentiful supply of 2014 tax to save your clients money should they require tax at earlier provisional tax dates.
Should your client be making a P3 payment of more than $100,000, please talk to them about paying this through tax pooling.
This makes available to them the full benefits of tax pooling.