26 CFR § 25.6161-1 - Extension of time for paying tax or deficiency.
(a) In general -
(1) Tax shown on return. A reasonable extension of time to pay the amount of tax shown on the return may be granted by the district director at the request of the donor. The period of such extension shall not be in excess of six months from the date fixed for the payment of the tax, except that if the taxpayer is abroad the period of extension may be in excess of six months.
(2) Deficiency. The time for payment of any amount determined as a deficiency in respect of tax imposed by Chapter 12 of the Code, or for payment of any part thereof may be extended by the district director at the request of the donor for a period not to exceed 18 months from the date fixed for the payment of the deficiency, as shown on the notice and demand from the district director, and, in exceptional cases, for a further period not in excess of 12 months. No extension of time for the payment of a deficiency shall be granted if the deficiency is due to negligence, to intentional disregard of rules and regulations, or to fraud with intent to evade tax.
(3) Extension of time for filing distinguished. The granting of an extension of time for filing a return does not operate to extend the time for the payment of the tax or any part thereof, unless so specified in the extension.
(b) Undue hardship required for extension. An extension of the time for payment shall be granted only upon a satisfactory showing that payment on the due date of the amount with respect to which the extension is desired will result in an undue hardship. The extension will not be granted upon a general statement of hardship. The term “undue hardship” means more than an inconvenience to the taxpayer. It must appear that substantial financial loss, for example, loss due to the sale of property at a sacrifice price, will result to the donor from making payment on the due date of the amount with respect to which the extension is desired. If a market exists, the sale of the property at the current market price is not ordinarily considered as resulting in an undue hardship.
(c) Application for extension. An application for an extension of the time for payment of the tax shown on the return, or for the payment of any amount determined as a deficiency, shall be in writing and shall be accompanied by evidence showing the undue hardship that would result to the donor if the extension were refused. The application shall also be accompanied by a statement of the assets and liabilities of the donor and an itemized statement showing all receipts and disbursements for each of the 3 months immediately preceding the due date of the amount to which the application relates. The application, with supporting documents, must be filed with the applicable district director referred to in paragraph (a) of § 25.6091-1 regardless of whether the return is to be filed with, or the tax is to be paid to, such district director on or before the date prescribed for payment of the amount with respect to which the extension is desired. The application will be examined by the district director, and within 30 days, if possible, will be denied, granted, or tentatively granted subject to certain conditions of which the donor will be notified. If an additional extension is desired, the request therefor must be made to the district director on or before the expiration of the period for which the prior extension is granted.
(d) Payment pursuant to extension. If an extension of time for payment is granted, the amount the time for payment of which is so extended shall be paid on or before the expiration of the period of the extension without the necessity of notice and demand from the district director. The granting of an extension of the time for payment of the tax or deficiency does not relieve the donor from liability for the payment of interest thereon during the period of the extension. See section 6601 and § 301.6601-1 of this chapter (Regulations on Procedure and Administration).