# Quarterly Estimated Taxes for Solopreneurs: A No-Nonsense Guide Solopreneurs must pay quarterly estimated taxes if they expect to owe $1,000 or more in federal taxes for the year. The four deadlines are April 15, June 16, September 15, and January 15. The safest calculation method: pay 100% of last year's tax liability in equal quarterly installments (110% if your AGI exceeded $150,000). This eliminates underpayment penalties regardless of what you actually earn. Missing a quarterly estimated tax payment doesn't just mean a penalty — it means a surprise bill in April that can derail your cash flow. Here's how to calculate, schedule, and pay without the stress. Read the full article at https://solofilinglab.com/articles/quarterly-estimated-taxes-solopreneurs-guide