The 30-year-old from Prestonpans was crowned the undisputed light-welterweight champion of the world after his win over American opponent Jose Ramirez in Las Vegas last month.
The victory meant he became the first British fighter to claim the WBO, WBA, IBF and WBC titles simultaneously since the four-belt era officially began in 2004.
Nicknamed the Tartan Tornado, Taylor is set to see his income soar as money-spinning fights at huge venues are being lined up for him.
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But latest accounts for his company Laser Sports show he has already made a fortune from his six-year, 18-fight professional career.
The firm declared total assets of £985,236 for 2019 - a massive rise from the previous year's figure of £171,600.
The company owed creditors £230,042 within a year leaving Taylor with shareholder funds of £755,194. In 2018, its shareholder funds were £86,551.
Taylor set up the London-based business in August 2015 shortly after he turned professional following his gold medal win at 2014 Glasgow Commonwealth Games.
He is the sole director of the company and owns all the shares in it.
Last year he also set up a property investment firm called Tartan Tornado Properties for the 'buying and selling of own real estate'.
That company, which is based in Musselburgh, is yet to file its first set of accounts.
Taylor returned to Prestonpans last week to a hero's welcome but told of his frustration that he couldn't spend more time with those who had lined the streets because of quarantine guidelines.
He said: "The homecoming in Prestonpans was really cool. Driving back home, the streets were filled with familiar faces - friends, family and so many people I've known for so long.
"There were a lot of kids there as well, all cheering me on, singing and dancing, making a big scene of it. It was really special. But I wanted nothing more than to just get out of the car and embrace them, join them in celebrations, go into the pub with them all and have a big party.”