Providers who have cut drawdown charges in the run-up to April 6 to "grab market share" will revisit their decisions in the months to come, suggested LV=.
Providers have said a charge cap on income drawdown, as proposed by Labour leader Ed Miliband, is "unnecessary" and a "solution to a problem that does not even exist".
More than half a million people will be able to take advantage of the government's changing regulation around pensions from 6 April, according to latest official estimates.
A drawdown charge cap should be placed on sales to provider's existing customers to ensure people are not sold inappropriate products after pensions freedom comes into effect, Which? has said.
Standard Life will scrap charges linked to its flexible drawdown product in readiness for pensions freedom from 6 April.
Retirement Planner is hosting its third breakfast briefing on 26 March looking at the options and opportunities pensions freedom presents for advisers.
Aegon has launched a dedicated website and interactive tool to assist advisers working with clients on pensions flexibility.
Insurer LV= has called for a levy to be put on transactions where a client purchases a retirement plan from their existing pensions provider.
All defined benefit (DB) pension transfers after 6 April will be regulated by the Financial Conduct Authority (FCA) to ensure mandatory advice has been taken and fully understood.
The next government cannot afford to wait until 2017 to review minimum auto-enrolment contributions, according to pensions minister Steve Webb.