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What is a Tax Calculator?

Tax is a compulsory contribution paid by citizens to the state based on legislation, used to finance development and government administration. In Indonesia, the tax system is regulated by the Directorate General of Taxation (DJP) under the Ministry of Finance. Kalkulab's Tax Calculator serves as a practical solution for the general public, SME operators, and businesses to calculate their tax obligations quickly and accurately. This calculator supports calculations for several main tax types in Indonesia. First, VAT (Value Added Tax) at the standard rate of 11%...

Indonesian Tax Formula

Tax = Tax Base × Tax Rate

Variables:

  • VATValue Added Tax
    Tax on consumption of goods/services(e.g.: 11% of selling price)
    💡 Calculate selling price with VAT
  • PPh 21Income Tax Article 21
    Employee income tax(e.g.: Progressive rate 5-35%)
    💡 Calculate employee net salary
  • SME TaxSME Final Tax
    Final tax for micro businesses(e.g.: 0.5% of turnover)
    💡 Calculate small business tax
  • Tax BaseTax Base
    Base value for tax calculation(e.g.: $1,000)
    💡 Tax rate multiplier base

Categories:

VAT11% for goods/services
PPh 215-35% progressive rate
SME Tax0.5% of business turnover

How to Use the KalkuLab Tax Calculator

Select the tax type you want to calculate, enter the required data, and get instant results.

  1. 1

    Select Tax Type

    Choose VAT, Income Tax Article 21 (PPh 21), or SME Final Tax (PPh UMKM) as needed.

  2. 2

    Enter Values

    For VAT: enter the item price. For PPh 21: enter monthly salary. For SME tax: enter business turnover.

  3. 3

    View Results

    The system automatically calculates the tax payable.

💡 Tip:

  • •Use your tax ID (NPWP) for official reporting on the tax authority portal.
  • •Keep tax withholding certificates for annual tax return (SPT) filing.
  • •Consult a certified tax advisor for complex cases.

Examples

Example 1: Calculate 11% VAT on a Purchase

Problem:

A store sells a laptop for IDR 15,000,000 (excluding VAT). What is the total price the buyer pays?

Solution:
  1. 1.VAT = 11% × IDR 15,000,000 = IDR 1,650,000
  2. 2.Total = IDR 15,000,000 + IDR 1,650,000
Result:IDR 16,650,000

The buyer pays IDR 16,650,000 including 11% VAT.

Example 2: Employee PPh 21 Calculation

Problem:

Budi earns IDR 10,000,000 per month. How much PPh 21 is withheld each month?

Solution:
  1. 1.Annual income = IDR 10,000,000 × 12 = IDR 120,000,000
  2. 2.PTKP (single/0) = IDR 54,000,000
  3. 3.Taxable income = IDR 66,000,000
  4. 4.Tax = 5% × 50M + 15% × 16M = IDR 4,900,000/year
  5. 5.Monthly PPh 21 = IDR 4,900,000 ÷ 12
Result:IDR 408,333/month

The employer withholds IDR 408,333 in PPh 21 from Budi's salary each month.

Example 3: SME Final Tax at 0.5%

Problem:

Mrs. Sari's food stall has monthly turnover of IDR 50,000,000. How much SME tax is owed?

Solution:
  1. 1.Monthly turnover = IDR 50,000,000
  2. 2.SME tax = 0.5% × IDR 50,000,000
Result:IDR 250,000/month

Mrs. Sari must pay IDR 250,000 in SME Final Tax each month.

Example 4: Reverse Calculation — Price Before VAT

Problem:

An item is sold for IDR 11,100,000 including 11% VAT. What is the pre-VAT price?

Solution:
  1. 1.Price including VAT = 111% of base price
  2. 2.Base price = IDR 11,100,000 ÷ 1.11
Result:IDR 10,000,000

The price before VAT is IDR 10,000,000.

Frequently Asked Questions

What is 11% VAT and who must pay it?
VAT (Value Added Tax) is a tax on consumption of goods and services in Indonesia at 11% (Law No. 7/2021). VAT-registered businesses must collect VAT on taxable goods (BKP) and services (JKP) within the customs territory.
How is PPh 21 calculated for permanent employees?
PPh 21 uses progressive rates: 5% up to IDR 50M, 15% for 50–250M, 25% for 250–500M, 30% for 500M–5B, and 35% above 5B. Net income is calculated after PTKP deductions (e.g., IDR 54M for single/no dependents).
What is SME Final Tax at 0.5% and who pays it?
SME Final Tax is 0.5% of business turnover for eligible taxpayers (micro, small, medium enterprises). Regulated under Government Regulation No. 55/2022, it applies to individuals and entities with turnover up to IDR 4.8B per year.
Does this calculator provide official tax reporting results?
This calculator provides an educational estimate. For official filing, use the tax authority online services (e-Filing, e-Bupot) or consult a certified tax consultant. Results here can serve as a preliminary guide.
What is the difference between PPh 21 and PPh 23?
PPh 21 is income tax on employment, services, or activities by individual taxpayers. PPh 23 is tax on income from capital, certain services, or dividends received by domestic taxpayers other than individuals running a business.
How do SMEs file annual tax returns (SPT)?
SMEs can file using Form 1770 SS (freelance/simple SME) or 1770 S (business with bookkeeping). Filing is done online via the tax portal or e-Filing with SME Final Tax withholding proof attached.
Is the KalkuLab Tax Calculator free and always available?
Yes, the KalkuLab Tax Calculator is completely free and accessible 24/7 from any device. No registration or login required — just open the website and start calculating.

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References