Alliance Trust Savings (ATS) has turned its first monthly profit, according to accounts filed today.
The platform arm of Alliance Trust made a £400,000 loss in 2012, up from a £2.3m loss £2.3m the previous year.
Assets under administration rose from £3.3bn to £4.1bn, as the firm begins to shift its strategy towards targeting advised business.
Its parent company invested about £2m in the platform in 2012.
Alliance Trust CIO, Katherine Garrett-Cox, said ATS "is now well positioned to perform profitably and pick up market share as a result of the changes that are being implemented as part of the RDR [Retail Distribution Review]."
Revenue increased 39% following the introduction of quarterly charges on account, higher platform SIPP charges, and adding an additional 4,000 customers - a rise of 6%.
The platform, relatively unusual in offering a flat fee charging structure, has also introduced a tiered model to allow it to be compared to rivals.
Has been cold-calling consumers
New shares admitted to London Stock Exchange
Slow and steady growth
Missed funding target by £240,000
Denies any wrongdoing