As a small business owner, you are responsible for both Federal income tax and self-employment taxes that are typically withheld and paid by an employer. Per the IRS, you must withhold and pay at least 90% of these taxes during the year to avoid a penalty. These payments are due quarterly on April 15th, June 15th, September 15, and January 15th and can be via mail or online using the links below.  

https://www.irs.gov/pub/irs-pdf/f1040es.pdf 

https://www.eftps.gov/eftps/ 

https://www.irs.gov/payments/direct-pay 

If you need assistance calculating an estimate of how much you will owe, the IRS provides a Tax Withholding Estimator that can help.  

https://www.irs.gov/individuals/tax-withholding-estimator 

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