Free Tools
Deposit Interest Calculator (After Tax)
Compute net deposit interest after the often-overlooked 20% final tax, plus final total and a compounding option. Free.
Don't forget the 20% tax
Many calculators forget to deduct the 20% final tax on deposit interest. This result already accounts for it. An estimate based on your assumptions; real investments fluctuate and carry risk. This isn't financial advice — consider consulting a financial planner.
Deposit result
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Understanding deposit interest
Gross interest
Interest before tax = amount × rate/year × (tenor ÷ 12). This is the figure banks often promote, but before tax is deducted.
20% final tax
Deposit interest is subject to a 20% final tax (PP 131/2000). Many calculators forget to deduct this, so results look larger than what's actually received.
Net interest & final total
Net interest = gross − tax. Final total = amount + net interest. With compounding, each period's net interest also earns interest.
FAQ
Frequently asked questions
How do I calculate net deposit interest?
Gross interest = amount × rate/year × (tenor ÷ 12), then subtract the 20% final tax. E.g. Rp100M, 5%, 12 months → gross Rp5M, tax Rp1M, net Rp4M.
Is deposit interest taxed?
Yes. Deposit interest is subject to a 20% final tax (PP 131/2000), withheld directly by the bank. Being final, it isn't recombined with other income in the return.
Why is my deposit yield lower than promoted?
Because the promoted rate is usually before tax. After the 20% final tax, the net interest you receive is smaller. This calculator already accounts for the tax.
What is compounding on a deposit?
If the deposit auto-renews (rolls over) with interest reinvested, the next period's interest is on a larger balance. This compounding effect adds yield over long tenors.
Is a deposit risk-free?
Deposits are relatively safe and guaranteed by the deposit insurance up to a limit, but returns can be below inflation. Consider your goal and horizon when choosing instruments.
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