The firm says the milestone “further cements our position as the most popular cashflow planning tool in the UK”.
It is one of a number of cashflow modelling tools including Prestwood and Voyant.
Ray Adams, director and in-house Chartered Financial Planner, who launched the firm in 2014 revealed the firm was celebrating its latest achievement and was looking to the future.
He said: “We develop CashCalc based on feedback made by our users and because we receive so much constructive feedback every single day, we're relentlessly improving what we offer based on the ideas and experiences of regulated financial advisers across the UK.
“Moreover, with an additional 3,000 registered account holders during the last 12 months alone, both figures indicate the use of cashflow planning is still on the rise within our profession.”
He added: “We believe there is a movement afoot, an evolution in how we conduct financial advice.”