The Lansing, Michigan-based insurer produced £497 million or $647 million, in sales for the quarter, up from £362 million in the first quarter of 2016.
Higher interest rates help increase yields on a life insurer's investment portfolio, and Jackson National says interest rates were in higher in the first quarter than they were a year earlier.
The average government bond yield for the U.S. variable annuity operations increased to 2.4%, from 1.8%. The average discount rate for the company's variable annuity obligations increased to 6.8%, from 6.3%.
Prudential, which is based in London and has no connection with Prudential Financial Inc., released Jackson National performance numbers along with its own first-quarter earnings.
Prudential says its total new sales increased to £1.9 billion, from £1.4 billion in the year-earlier quarter.
External assets under management increased to £187 billion, from £158 billion.
Jackson National' assets increased because of a combination of higher variable annuity sales and a higher number of deals with institutions, Prudential said.
In general, "in the U.S., we believe current regulatory developments play to Jackson's established strengths," the company says.
The U.S. Department of Labor's fiduciary rule could make it easier for Jackson National to reach clients who have advisors and who are not yet using variable annuities, the company says.
--- Read Top 10 Annuity Providers: Q2 2016 on ThinkAdvisor.