Calculate Your Safe Harbor Amount
Plus download a calendar with automatic reminders for all 4 quarterly deadlines
What is Safe Harbor?
Safe Harbor is an IRS provision that protects you from underpayment penalties - even if you end up owing more tax at year-end. It's a "minimum payment guarantee" that keeps you penalty-free.
The Core Rule:
If you pay at least one of these amounts in quarterly estimated taxes, the IRS won't penalize you:
- 100% of prior year tax (110% if AGI > $150K)
- 90% of current year tax
Calculate Your Safe Harbor Amount Now
Get your exact quarterly payment + download a calendar with 7-day advance reminders