Borrowing ৳10,000 at 2 taka per 100 a month for 6 months costs ৳1,200 in interest, ৳11,200 in total. That rate is really 24% a year in simple interest. Enter your amount, how the rate was quoted and the period below.
৳
= 10 thousand taka
taka / 100 / month
Period as
Pick a date, or type day/month/year (e.g. 16/03/2026)
Day counting
Total interest
৳1,200
Repay ৳11,200 in total
Principal
৳10,000
Interest
৳1,200
Principal + interest
৳11,200
Period
6 months 0 days
Monthly rate
2%
True yearly rate
24%
Debt doubles in
4 years 2 months (2 years 11 months if unpaid interest is added each month)
Borrowing ৳10,000 at 2 taka / 100 / month for 6 months 0 days costs ৳1,200 in interest, ৳11,200 in total. That rate is really 24% a year in simple interest.
30-day months: village counting takes whole months and treats leftover days as part of a 30-day month. With dates you can also choose exact days.
Unpaid interest: often unpaid interest is added to the principal at the year end, and the debt grows faster. See the interest-on-interest calculator.
Alternatives: bank agricultural loans and licensed microfinance institutions usually charge far less than moneylenders.
More: how village interest is quoted
Informal and village loans are rarely quoted per year. They are quoted per month or per day: ‘3 taka per 100 a month’, ‘50 per 1,000 a month’ or ‘one anna per taka’. These sound small but can be several times a bank’s rate over a year.
The anna and paisa quotes come from the old currency: 1 taka = 16 anna = 64 paisa. Since decimalisation 1 taka = 100 paisa, so ‘one paisa per taka’ depends on which paisa is meant.
Many people avoid interest for religious reasons. This calculator does not encourage borrowing; it only shows the true cost clearly.
Frequently asked questions
What is 3 taka per 100 a month per year?
3% a month is 36% a year in simple interest: ৳300 a month or ৳3,600 a year on ৳10,000.
What does one anna per taka mean as a percentage?
1 taka = 16 anna, so one anna per taka a month is 6.25% a month or 75% a year. On ৳5,000 for 4 months that is ৳1,250.
How is interest in paisa per taka worked out?
Today 1 taka = 100 paisa, so 2 paisa per taka a month is 2% a month, 24% a year. In the old system 1 taka = 64 paisa, so 1 paisa per taka was about 1.56% a month. Ask the lender which paisa is meant.
How is interest for 2 months 15 days counted?
Villages usually count whole months and treat the leftover days as part of a 30-day month: 2 months 15 days = 2.5 months, so ৳10,000 at 2 per 100 costs ৳500. Counting the exact 74 days at the yearly rate gives about ৳486.58.
When does the debt double?
At 2 per 100 a month in simple interest, the interest equals the principal after 50 months (4 years 2 months). If unpaid interest is added every month, the debt doubles in about 35 months.
Is such a rate legal?
We could not confirm an enforced legal cap on private lending rates in Bangladesh. Bank agricultural loans and licensed microfinance loans charge far less and within set limits. Put large loans in a written agreement.
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