Interest for 6 months
R1,000.00
R11,000.00 in total · R166.67 a month
amount
- Amount
- R10,000.00
- 20% a year × 0.5 years
- R1,000.00
Amount × rate × time, on the amount only.
Simple interest calculator South Africa
rate a year{}
{}
{"rate":20}
Interest
South Africa · TapTip Tools
No. 21D9BF
11 Oct 2026 09:07
Interest for 6 months
R1,000.00
- Amount
- R10,000.00
- Rate
- 20% a year
- Each month adds
- R166.67
- Total
- R11,000.00
- Simple interest: amount × rate × time, no interest on interest.
Scan to open this calculation.
taptiptools.com/south-africa/simple-interest-calculator
Good to know
Questions people ask
How is simple interest calculated?
Interest = amount × rate × time. K10,000 at 20% a year for 6 months: 10,000 × 20% × 0.5 = K1,000, so K11,000 in total.
Simple or compound interest?
Simple interest is only on the amount you started with. Compound interest is also on interest already added, so it grows faster: the savings calculator works that way.
How are days counted?
As a share of a 365-day year: 90 days at 20% a year is 20% × 90/365 = 4.93%.
What does a rate "a month" mean in a year?
A rate a month times 12, with simple interest: 5% a month is 60% a year. Loans quoted per month cost far more than they sound.