Know Exactly What to Pay Before Your Next Estimated Tax Deadline
Use our free Safe Harbor Tax Calculator to estimate how much you may need to pay, compare IRS Safe Harbor methods, and reduce the risk of an unexpected tax bill.
Calculate Your Safe Harbor
Determine the minimum payment needed under the IRS Safe Harbor rules.
Compare IRS Rules
Instantly compare the 90%, 100%, and 110% Safe Harbor calculations.
Track Payments
Include your withholding and estimated tax payments already made.
Understand the Math
Learn how the IRS calculation works without reading complicated tax publications.
Who It’s For
Is This Calculator Right for You?
Estimated taxes can feel confusing when your income changes, your business grows, or you simply aren’t sure whether you’ve paid enough. This calculator gives you a clearer place to start.
Your income changed
Your business or freelance income increased, and you’re concerned that last year’s payment strategy may no longer be enough.
You’re unsure what to pay
You know estimated taxes may apply to you, but you aren’t sure how much to send or which Safe Harbor rule applies.
You’ve already made payments
You’ve paid through quarterly deposits or payroll withholding, but you don’t know whether those payments are enough.
You want fewer tax surprises
You’ve faced an unexpected tax bill before and want to take a more proactive approach this year.
Made with you in mind
Created for independent earners and growing business owners
“How much should I send the IRS this quarter?”
“Have I paid enough to avoid an underpayment penalty?”
You’re in the right place. This tool helps you understand the numbers without burying you in confusing tax jargon.
A clearer way forward
Tax planning shouldn’t feel like guesswork. Understanding your estimated tax obligations can help you reduce stress, protect your cash flow, and make more informed business decisions.