Error 429
When using the OpenAI API through our Microsoft Excel add-in "ChatGPT for Excel", you may encounter error 429. The add-in requires credits on your OpenAI account or an active monthly billing plan.
Types of Error 429
Error 429 can occur for two main reasons:
- insufficient_quota - quota exceeded or credits depleted
- rate_limit_exceeded - requests per minute limit exceeded
| Reason | Solution |
Check Balance and Credits Credits have run out or billing is not set up |
Important: As of 2025, new users may not receive automatic free credits. Often, adding a payment method is required immediately. |
API Key Issue API key was created BEFORE adding a payment method |
|
Second Account with Same Phone Number Created a second OpenAI account with the same phone number |
|
Rate Limit Exceeded Too many requests per minute |
|
| Check Organization and Project |
|
Did you create your second account? You’re getting error |
It’s confirmed that free credit is given based on phone numbers, as explained on the official OpenAI forum by @logankilpatrick: Also note, you only get free credits for the first account associated with your phone number. Subsequent accounts are not granted free credits. |
| Other | Cancel paid account and renew it with a different payment method In API Keys under Default Organizations, click the dropdown and click my organization and re-saved it. Make sure to confirm it Just doing that also reset the soft limit. Afterwards, create a new API key |
OpenAI Tier System
OpenAI uses a tier system to determine limits:
- Free Tier: Minimal limits, requires adding a payment method
- Tier 1: After first payment ($5+)
- Tier 2: After $50 usage
- Tier 3: After $100 usage and 7+ days since first payment
- Tier 4: After $250 usage and 14+ days
- Tier 5: After $1000 usage and 30+ days
Each tier provides higher RPM (requests per minute) and TPM (tokens per minute) limits.
Free Tokens Program (Until April 30, 2025)
OpenAI offers organizations a free tokens program:
- Up to 11 million tokens per day free
- Requires consent to share request data for model improvement
- Available only for organizations, not individual developers
- Program extended until April 30, 2025