Taxes are 💩, but with [AI]
Is your SPT NIHIL? Check here in 5 minutes.
coretAIx is not an official DJP product. AI can make mistakes. Always verify.
Everything you need
Powerful features for the headache that is taxes
Tax AI Chat
Ask anything about Indonesian taxes. Our AI understands local regulations and is available 24/7.
NIHIL Status Check
Instantly know if your SPT is NIHIL, Underpaid, or Overpaid in seconds.
SPT Wizard
Step-by-step guidance for filing SPT Tahunan on Coretax. Sections A-K, no more confusion.
Document OCR
Upload your 1721-A1/A2 tax slips, AI reads and extracts data automatically. No more manual input.
Tax Calculator
Calculate PPh 21, PPh Final for SMEs, and other tax simulations accurately.
Error Decoder
Got an error on Coretax/DJP Online? Paste the code, AI explains and provides solutions.
How does it work?
Three simple steps. Done before your coffee gets cold.
Sign Up & Answer Questions
Create a free account and answer a few questions about your tax status. Only 5 minutes.
Sign Up & Answer Questions
Create a free account and answer a few questions about your tax status. Only 5 minutes.
AI Analyzes Your Tax Status
Our AI analyzes your data, matches it with the latest tax regulations, and determines your status.
AI Analyzes Your Tax Status
Our AI analyzes your data, matches it with the latest tax regulations, and determines your status.
Follow Step-by-Step SPT Guide
Get a personalized guide to fill out the correct SPT form. Just follow along, and you are done.
Follow Step-by-Step SPT Guide
Get a personalized guide to fill out the correct SPT form. Just follow along, and you are done.
Want to know if your SPT is NIHIL?
Free preview. Full analysis for Pro users.
NIHIL Analysis
Upgrade for full analysis
- SPT filing recommendations
- Status change simulations
- PDF report download
Tax Consultant vs coretAIx
Compare for yourself. You decide.
Tax Consultant
coretAIx Pro
coretAIx is not a replacement for tax consultants in complex cases. For simple situations (employees, MSMEs), AI is more than enough.
Fair Pricing
Start free. No credit card required. Upgrade when you need more.
Free
For those who want to try first
- 5 AI questions per day
- 3 document uploads
- Basic tax calculator
- 5 error decodes per day
- Tax calendar
- Unlimited AI chat
- Automatic document OCR
- Full NIHIL analysis
- Step-by-step SPT wizard
- Priority support
Pro
For those serious about taxes
Promo price until March 25, 2026!
- Unlimited AI chat
- Unlimited document uploads
- Full tax calculator
- Unlimited error decodes
- Tax calendar + notifications
- Automatic document OCR
- Full NIHIL analysis
- Step-by-step SPT wizard
- Save & export calculations
- Priority support
Frequently Asked Questions
Can't find the answer? Our AI chat can help.
Legal Disclaimer
- 1
coretAIx is NOT an official product of the Directorate General of Taxes (DJP) and is NOT affiliated with DJP, the Ministry of Finance of the Republic of Indonesia, or any government agency.
- 2
Content and AI analysis results provided are for informational and educational purposes only, and do NOT constitute professional tax advice. Always consult with a licensed tax consultant for important tax decisions.
- 3
AI can make mistakes. Always verify all analysis results, calculations, and recommendations against applicable tax regulations and official DJP sources.
- 4
User data is encrypted and protected according to industry security standards. We do not store sensitive tax data longer than necessary to provide our services.
- 5
Users are fully responsible for the accuracy of data inputted and tax filing decisions made. coretAIx is not liable for any losses arising from the use of this service.
Don't wait until March 31!
Annual SPT filing deadline is approaching fast.