
Prescribed interest rate payable to SARS
Interest charged on late payment or underpayment of provisional tax and late payment of assessed tax or STC. Interest will be charged from a specific date and no longer on the assessment date.
| Effective date | Rate | |
| 1984 | 1 September | 15% |
| 1989 | 1 June | 18% |
| 1994 | 1 April | 15% |
| 1998 | 1 December | 19% |
| 1999 | 1 May | 16% |
| 1 September | 14.5% | |
| 2000 | 1 March | 13% |
| 2002 | 1 October | 15.5% |
| 2003 | 1 April | 16.5% |
| 1 July | 15% | |
| 1 September | 14% | |
| 1 October | 13% | |
| 1 December | 11.5% | |
| 2004 | 1 November | 10.5% |
| 2006 | 1 November | 11% |
| 2007 | 1 March | 12% |
| 1 November | 13% | |
| 2008 | 1 March | 14% |
| 1 September | 15% | |
| 2009 | 1 May | 13.5% |
Prescribed interest rate payable by SARS
Interest is payable to taxpayers who have overpaid provisional tax by at least R10 000. Interest is also paid if taxable income exceeds R50 000 (individuals and trusts) and R20 000 (companies and close corporations) and if an appeal is won or conceded. Interest will be paid from a specific date and no longer on the assessment date
| Effective date | Rate | |
| 1998 | 1 December | 14% |
| 1999 | 1 May | 12% |
| 1 September | 10.5% | |
| 2000 | 1 March | 9% |
| 2002 | 1 October | 11.5% |
| 2003 | 1 April | 12.5% |
| 1 July | 11% | |
| 1 September | 10% | |
| 1 October | 9% | |
| 1 December | 7.5% | |
| 2004 | 1 November | 6.5% |
| 2006 | 1 November | 7% |
| 2007 | 1 March | 8% |
| 1 November | 9% | |
| 2008 | 1 March | 10% |
| 1 September | 11% | |
| 2009 | 1 May | 9.5% |
Fringe benefits (official rate)
| Effective date | Rate | |
| 1998 | 1 December | 19% |
| 1999 | 1 May | 16% |
| 1 September | 14.5% | |
| 2000 | 1 March | 13% |
| 2001 | 1 October | 10.5% |
| 2002 | 1 March | 11.5% |
| 1 September | 13.5% | |
| 2003 | 1 March | 14.5% |
| 1 July | 13% | |
| 1 September | 12% | |
| 1 December | 9.5% | |
| 2004 | 1 March | 9% |
| 1 September | 8.5% | |
| 2005 | 1 September | 8% |
| 2006 | 1 September | 9% |
| 2007 | 1 March | 10% |
| 1 September | 11% | |
| 2008 | 1 March | 12% |
| 1 September | 13% | |
| 2009 | 1 March | 11.5% |
| 1 June | 9.5% | |
| 1 July | 8.5% | |
| 1 September | 8% | |
Usury Act interest rates
| Effective date | Rate | Rate | Rate | |
| Capital | To R6 000 | R6 001 – R500 000 | More than R500 000 | |
| 1993 | 22 January | 29% | 26% | No max. |
| 12 March | 28% | 25% | No max. | |
| 24 December | 26% | 23% | No max. | |
| 1994 | 11 November | 28% | 25% | No max. |
| 1995 | 7 April | 29% | 26% | No max. |
| 22 September | 31% | 28% | No max. | |
| 1997 | 14 March | 32% | 29% | No max. |
| 1998 | 21 August | 36% | 33% | No max. |
| 1999 | 16 July | 31% | 28% | No max. |
| 22 October | 27% | 24% | No max. | |
| 2000 | 24 March | 25% | 22% | No max. |
| To R10 000 | More than R10 000 | |||
| 2001 | 16 February | 25% | 22% | No max. |
| 7 September | 24% | 21% | No max. | |
| 9 November | 23% | 20% | No max. | |
| 2002 | 12 June | 26% | 23% | No max. |
| 2003 | 1 October | 24% | 21% | No max. |
| 21 November | 22% | 19% | No max. | |
| 2004 | 6 February | 21% | 18% | No max. |
| 17 September | 20% | 17% | No max. | |
| 2007 | 7 March | 23% | 20% | No max. |
Since 2004, these Usury Act interest rates have been linked to the Repurchase Rate (‘the Repo Rate’) as determined by the Monetary Policy Committee of the South African Reserve Bank. For transactions not exceeding R10 000 the limit, since 26 February 2007 is the Repo Rate plus a third of the rate plus 11%; for transactions exceeding R10 000 it is the Repo Rate plus one third of the rate plus 8%. If this is not a whole number it gets rounded down to the nearest whole number.
Prime bank overdraft rates
| Effective date | Rate | |
| 1988 | 25 January | 13% |
| 10 March | 14% | |
| 7 May | 15% | |
| 30 July | 16% | |
| 3 November | 18% | |
| 1989 | 1 March | 19% |
| 8 May | 20% | |
| 11 October | 21% | |
| 1991 | 2 April | 20% |
| 1 October | 20.25% | |
| 1992 | 28 March | 19.25% |
| 6 July | 18.25% | |
| 23 November | 17.25% | |
| 1993 | 25 February | 16.25% |
| 1 November | 15.25% | |
| 1994 | 26 September | 16.25% |
| 1995 | 22 February | 17.5% |
| 3 July | 18.5% | |
| 1996 | 29 April | 19.5% |
| 20 May | 20.5% | |
| 1 July | 19.5% | |
| 1 October | 19.25% | |
| 21 November | 20.25% | |
| 1997 | 24 October | 19.25% |
| 1998 | 9 March | 18.25% |
| 15 June | 20.25% | |
| 30 June | 22.25% | |
| 3 July | 24% | |
| 29 August | 25.5% | |
| 19 October | 24.5% | |
| 9 November | 23.5% | |
| 7 December | 23% | |
| 1999 | 11 January | 22% |
| 9 February | 21% | |
| 8 March | 20% | |
| 19 April | 19% | |
| 21 June | 18% | |
| 16 July | 17.5% | |
| 2 August | 16.5% | |
| 4 October | 15.5% | |
| 2000 | 19 January | 14.5% |
| 2001 | 13 June | 13.75% |
| 16 July | 13.5% | |
| 25 September | 13% | |
| 2002 | 16 January | 14% |
| 18 March | 15% | |
| 14 June | 16% | |
| 13 September | 17% | |
| 2003 | 13 June | 15.5% |
| 18 August | 14.5% | |
| 15 September | 13.5% | |
| 20 October | 12% | |
| 15 December | 11.5% | |
| 2004 | 13 August | 11% |
| 2005 | 15 April | 10.5% |
| 2006 | 8 June | 11% |
| 3 August | 11.5% | |
| 13 October | 12% | |
| 8 December | 12.5% | |
| 2007 | 8 June | 13% |
| 17 August | 13.5% | |
| 12 October | 14% | |
| 7 December | 14.5% | |
| 2008 | 11 March | 15% |
| 13 June | 15.5% | |
| 11 December | 15% | |
| 2009 | 5 February | 14% |
| 25 March | 13% | |
| 4 May | 12% | |
| 29 May | 11% | |
| 14 August | 10.5% | |