It had earlier announced plans to sell a 30% stake via IPO in 2020.
Kulina was recently named among the four Southeast Asian startups selected for Google’s Launchpad Accelerator programme.
Go-Jek is learnt to have invested around $2 million in Pathao’s Series A round.
In September 2015, the company raised a sum of $10 million from early backer Paytm.
The deal size is said to be upwards of $50 million.
The tax app provider plans to use the funds to strengthen its technological expertise.
It had raised $2.5 million in 2016 from Golden Gate Ventures, 500 Startups and Lim Dershing.
Industry observers estimate the value of the deal at over $100 million.
Its first fund was launched in October 2012 and had achieved a final close of S$300 million.
The VC firm invests in startups in fintech, SaaS, Big Data analytics, marketplace and e-commerce.