Tax for Contractors: Final Income Tax on Construction Services, VAT, and What Gets Missed
Villa construction, shophouses, hotel renovations, and infrastructure projects keep contracting businesses in Bali growing. But contractor tax differs from other businesses: income from construction services is subject to a final income tax under Article 4(2), with the rate depending on the type of work and the certificates held. Choosing the wrong rate can mean underpayment, or margins eaten by tax that should have been lower.
The legal basis: GR 9 of 2022
Final income tax rates for construction services are set by GR 51/2008, most recently amended by GR 9/2022. Rates depend on the type of service and certification: a Business Entity Certificate (SBU) for companies, or a Work Competency Certificate (SKK) for individual contractors.
| Service | Condition | Rate |
|---|---|---|
| Construction work | Small qualification (SBU) or individual with SKK | 1.75% |
| Medium, large, or specialist qualification | 2.65% | |
| No certificate | 4% | |
| Integrated construction (design and build) | With SBU | 2.65% |
| Without SBU | 4% | |
| Construction consulting | With certificate | 3.5% |
| Without certificate | 6% |
The key message: certification determines the rate. A contractor without SBU/SKK pays 4% of the contract value, more than double the rate for a certified small contractor. On a IDR 2 billion project, the gap between 1.75% and 4% is IDR 45 million.
Make sure certificates are valid and that their classification matches the contracted work. The rate follows the conditions when income is received or paid, so a certificate expiring mid-project can change the rate for later instalments.
Who withholds, and when?
- If the client is a withholding agent (e.g. a PT, CV, government body, or other entity), the client withholds the final tax at payment or when it becomes due, whichever is earlier. The contractor receives a withholding slip, issued electronically in the Coretax era.
- If the client is not a withholding agent, for instance an individual building a private villa, the contractor must pay the final tax itself by the 15th of the following month.
The second case is very common in Bali and often missed. Many contractors assume there is no tax because the client withheld nothing, when in fact the obligation has shifted to the contractor.
Tax base: contract value, not profit
The final tax is calculated on the payment amount excluding VAT. Because it is final, project costs such as materials, labour, and equipment rental cannot be deducted. As a result:
- Loss-making projects are still taxed.
- Construction income and costs must be separated from other income (e.g. material sales or equipment rental) that falls under the regular rates.
- Quotations should already account for the final tax so margins are protected.
VAT on construction services
Construction services are also subject to VAT. A VAT-registered contractor (PKP) charges 12% VAT on an “other value” base of 11/12 of the contract price under MoF Regulation 131/2024, an effective 11%. Contractors must register for VAT once turnover exceeds IDR 4.8 billion a year.
One special rule matters for property owners: VAT on self-construction (PPN KMS). A person who builds a building of at least 200 m² without using a VAT-registered contractor owes PPN KMS. This is not charged to the contractor, but villa clients often ask about it.
Illustration: one progress billing
CV Karya Dewata (small-qualification SBU, VAT-registered) bills its first instalment of IDR 500,000,000 (excluding VAT) to a PT that owns a hotel.
- VAT: 12% × (11/12 × IDR 500 million) = IDR 55,000,000, charged by the CV and reported in its monthly VAT return.
- Final income tax: 1.75% × IDR 500 million = IDR 8,750,000, withheld by the hotel company.
- Cash received by the CV: IDR 500 million + IDR 55 million − IDR 8.75 million = IDR 546,250,000.
If the same CV had no SBU, the final tax would be IDR 20,000,000. That IDR 11.25 million difference comes from a single instalment.
The most common contractor tax mistakes
- A rate that does not match the certificate, e.g. the client withholds 4% although the contractor holds an SBU, or vice versa.
- Not self-paying when the client is an individual.
- Not matching withholding slips to billed instalments. Missing slips or a wrong tax ID mean tax already withheld cannot be proven.
- Mixing construction and non-construction income. Material sales outside the service contract are taxed at regular rates, not final.
- No project-level bookkeeping, making it hard to answer an SP2DK that compares reported turnover with clients’ withholding data.
Project bookkeeping, covering progress billings, advances, and retentions, is covered in our article on contractor bookkeeping: progress billings, retention, and VAT.
When does a contractor need a tax consultant?
Contractors usually need tax support when they start running several projects at once, register for VAT, work with large clients who are strict about tax documents, or receive an SP2DK over mismatched withholding data. A consultant who understands construction also helps build quotations that correctly account for final tax and VAT.
Agam Anand Konsultama supports contractors and construction consultants in Denpasar and across Bali with tax, project bookkeeping, and routine reporting. See our tax services or contact us for a free initial consultation via WhatsApp.
