When a taxpayer can not pay the IRS a lump sum payoff for their tax debt, they need to create a payment plan with the IRS. There are a number of options to consider when the payment plan is established. Obviously, it is almost always best to create the lowest monthly payment plan amount as possible and then pay more to get the balance down quickly, but not be at risk of defaulting the payment plan if money is tight. Therefore, there a number of factors to consider to get the correct balance of paying down the debt quickly, and not having a future issue. As with other payment plans that you might establish with a creditor, the amount you will pay will depend on the amount you owe, the amount you can afford to pay, and what assets and income you have.
As an overview, the IRS has many programs that allow for payments of taxes over time. The payment plans are within the discretion of the IRS, which means they decide the amount per month they will accept. Often it takes a lot of hard work to get the IRS to agree on an affordable number. The IRS does not give much flexibility with the monthly payment being late once the payment plan is established. In some rare instances, the payments can fluctuate if the person or business has seasonal income, or income on a non-recurring basis, such a lawyer who gets paid on contingency basis.
There are three common ways that you can make payments under the payment plan.