An extension to file is not an extension to pay tax.
Electronic filing is the fastest way to get a confirmed extension on record. The IRS offers two no-cost or low-cost paths before any commercial service is needed.
IRS Free File lets any individual taxpayer, regardless of income, e-file Form 4868 electronically at no charge. This is a direct IRS program, not a third-party product, and produces an IRS-confirmed extension.
Individuals who make an electronic payment through IRS Direct Pay, EFTPS, or a debit/credit/digital wallet payment and select that the payment is for an extension are automatically treated as having filed Form 4868 - no separate submission is required. A confirmation number is issued and should be retained as proof.
Businesses and other entities generally e-file Form 7004, Form 8868, and other extension forms through the IRS Modernized e-File system, accessed through IRS-authorized tax software or an authorized e-file provider - not filed directly by the taxpayer through an IRS web portal the way Form 4868 can be through Free File.
Commercial services, including tax software providers and dedicated extension-filing sites such as TaxExtension.com and FileLater.com, offer paid e-filing of extension forms, often bundled with confirmation tracking and reminders. This guide does not endorse any specific commercial service; see the resources page for a neutral list of official and third-party options so filers can compare. Before using any third-party service, confirm it is currently operating, uses IRS-authorized e-file transmission, and discloses its fees clearly.