Return on Investment

Is there a standardized (SEC) way to calculate the annual Total Return on a portfolio under the following circumstances.
The portfolio consists of two taxable accounts and two tax deferred accounts. Each account has equities, bonds, mutual funds and ETFs. Money moves from one of the tax deferred accounts to one of the taxable accounts and between the taxable accounts. Money leaves the portfolio during the year usually on a monthly basis (but often not the same amount each month) pay for a retiree's expenses .
I want to calculate the total return as if no money left the portfolio and compare that with the total return of a combination of well known index funds
Reply to
Avrum Lapin

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