Yes, it is very much possible to pay the estimated taxes online through the IRS website. The payments are received instantly though the online channels. This is also a great idea as you can rest assured as your payment will not get lost in the online channels. This is because the individual receives a confirmation number for all the payments, thus allowing you to hold on to a certain proof in case of any future references. What’s more, you can use the online channels from the comfort of your home.