After inflation, taxes and fees, what is a reasonable estimated return on my portfolio over the long term?

Equities on average have historically returned between 9% and 10%. Inflation consumes 2-3%, taxes perhaps 3%, and fees less than 1%, which leaves 3-4%. This is why we believe strongly in lower cost investing philosophies and why we advocate for saving early, often, and preferably in accounts that grow tax-deferred.