Creative Balance Bookkeeping
Estimated Tax Calculator
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Your income
$0$80,000$500k
$0$0$200k
$0$0$50k
Your estimated tax
Quarterly payment schedule
Safe harbor tip: Avoid penalties by paying at least 90% of this year's tax OR 100% of last year's tax (110% if prior year AGI exceeded $150,000). These figures are estimates for planning — your bookkeeper can help you fine-tune them.
Your corporation
$0$200,000$2M
$0$0$500k
Your estimated tax
Quarterly payment schedule
Note: C-corporations pay a flat 21% federal rate. Payments are required when you expect to owe $500 or more. Don't forget — corporate Q4 is due in December, not January. State corporate taxes vary separately.