Intuit, founded in 1983 in Mountain View, California, by Scott Cook and Tom Proulx, already sold Quicken when it released QuickBooks in 1992 for small business owners with no accounting training. The DOS version was built on Quicken’s code, while the Windows and Mac versions came from an acquired product called In-House Accountant. Professional accountants objected that it skipped double-entry bookkeeping, had weak security and lacked an audit trail, so overwritten numbers disappeared. Owners bought it anyway, it reached up to 85% of its market, and CPAs had to adapt once clients arrived with their books in QuickBooks.

By 2002 Intuit split the product into Basic, Pro, Premier, an Accountant edition and an Enterprise version that later ran on Linux servers in 2007, with industry editions and links to tax software such as Lacerte and ProConnect. A 2013 rebuild of QuickBooks Online paid off in 2014, when more new customers chose online than desktop. Intuit withdrew from India in January 2023, ended desktop support in the UK and Ireland on June 30, 2023, and retired QuickBooks Point of Sale in October 2023. Generative AI arrived with Intuit Assist in 2023, followed by AI agents for reconciliation and invoicing in 2025 and Intuit Intelligence in 2026.

• Intuit and Lighter Capital created a $15 million fund to encourage outside developers to build QuickBooks apps.
• By 2005 QuickBooks held about 74% of the U.S. retail market for small business accounting software.
• Online users passed 683,000 in 2014, the year online first beat desktop for new customers.
• In the first nine months of fiscal 2026, QuickBooks Online brought in $3.73 billion against $1.27 billion for desktop.
• The UK’s Making Tax Digital rules require qualifying sole traders and landlords to file through approved software from April 2026.