The milestone marks the latest stage in a rapid increase in demand for its services.
In 2014, it funded 9,500 vehicles worth a total of £63 million.
Earlier this year, the company said it aimed to fund 100,000 vehicles during 2017 across its customer base.
NextGear Capital provides stocking plans as either a complimentary or replacement source of funding to more than 1,200 independent and franchised dealers.
David Mercer, managing director of NextGear Capital, said: “It is fantastic to see the growth we have enabled among our dealer base.
“Reaching this milestone in wholesale vehicle funding means our dealers have not had to outlay the sum of £1 billion of their own capital on stock, freeing it up to help enhance their businesses in other ways.”
NextGear Capital supports dealers by funding vehicles direct from more than 60 auction and wholesale sources throughout the UK and Ireland.