Percentage vs flat fee models
Percentage fees scale with your portfolio. Flat monthly fees can win once your balance grows. Model both against your expected pot size.
Percentage fees vs flat fees, fund charges and how to estimate the real cost of investing.
5 min readPublished 10 February 2026Last updated 22 June 2026
Written by Teresa Mary, Chief Finance Editor
Percentage fees scale with your portfolio. Flat monthly fees can win once your balance grows. Model both against your expected pot size.
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