Estimated tax safe harbor: the 100% and 110% rules
A short, plain guide to estimated tax safe harbor, and a tested bot that does the job with your real inputs.
Unofficial, not affiliated with the IRS, any tax software or gig platform, OpenAI, Anthropic or xAI.
What you need
- Your side gig income so far this year and expected for the rest
- Business costs you can back up
- Last year's total tax from your return, for safe harbor math
How to do it
- Gather the inputs above in one place.
- Paste them into Gigly in ChatGPT, Claude or Grok.
- Read every step it shows. Fix any input that looks wrong and run it again.
- Check due dates and rates on the IRS site or with a tax pro. This is not tax advice.
Questions
How do i avoid an underpayment penalty?
It depends on your own numbers and the current rules. Gigly works it out from what you paste in and shows each step, so you can check it. Check due dates and rates on the IRS site or with a tax pro. This is not tax advice.
When does the 110% rule apply?
It depends on your own numbers and the current rules. Gigly works it out from what you paste in and shows each step, so you can check it. Check due dates and rates on the IRS site or with a tax pro. This is not tax advice.
Does w-2 withholding count?
It depends on your own numbers and the current rules. Gigly works it out from what you paste in and shows each step, so you can check it. Check due dates and rates on the IRS site or with a tax pro. This is not tax advice.
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