wedak naha. oken oya kiyana intrest ekak hambuwenne naha. 5% adui WHT ekath kapunama. Therumak naha. Danna epa pattama moda wedak.
WHT ekata 5% ekapara kapenne nane
chtgpt kiwe mehema
Step 1 – Confirm Tax Rate
In Sri Lanka:
- As of recent rules, 5% Withholding Tax is deducted at source on interest income (banks deduct this before paying you).
I’ll assume
5% WHT here.
Step 2 – Adjust Interest Rate
- Nominal annual rate = 9%
- After WHT = 9% × (1 − 0.05) = 8.55%
So effectively you earn
8.55% per year, paid monthly.
- Monthly rate = 8.55%÷128.55\% ÷ 128.55%÷12 = 0.7125%
Step 3 – Recurring Deposit Formula
Maturity=P×(1+r/n)nt−1(1+r/n)−1Maturity = P \times \frac{(1 + r/n)^{nt} - 1}{(1 + r/n) - 1}Maturity=P×(1+r/n)−1(1+r/n)nt−1
Where:
- P=19,000P = 19,000P=19,000
- r=0.0855r = 0.0855r=0.0855
- n=12n = 12n=12
- t=2t = 2t=2 years
Step 4 – Calculation
(1+r/n)=1+0.0855/12=1.007125(1 + r/n) = 1 + 0.0855/12 = 1.007125(1+r/n)=1+0.0855/12=1.007125 (1.007125)24≈1.1896(1.007125)^{24} \approx 1.1896(1.007125)24≈1.1896 1.1896−10.007125=0.18960.007125≈26.62\frac{1.1896 - 1}{0.007125} = \frac{0.1896}{0.007125} \approx 26.620.0071251.1896−1=0.0071250.1896≈26.62 Maturity=19,000×26.62≈505,780 LKRMaturity = 19,000 \times 26.62 \approx 505,780 \ \text{LKR}Maturity=19,000×26.62≈505,780 LKR
Step 5 – Net Gain
- Total deposits = 456,000 LKR
- Maturity value (after tax) ≈ 505,780 LKR
- Net profit ≈ 49,780 LKR
Final Answer (with 5% WHT):
If you invest Rs. 19,000 monthly for 2 years, you’ll get around
LKR 505,780, which is a profit of about
LKR 49,780 after tax.