Use the RMD Calculator with Tolleson Wealth Management

How the RMD Calculator turns a balance into ten years

The Tolleson Wealth Management RMD Calculator divides each year's opening balance by the IRS Uniform Lifetime Table divisor for your age, calculates that required withdrawal, then applies your expected return to the money remaining for the next year's estimate.

The first year uses the account balance on December 31 of the prior year. In each following year, the calculator uses the prior estimated year-end balance, so the required withdrawal usually rises as the IRS divisor falls with age.

This hypothetical example shows why a 4 percent return does not necessarily keep an account level once required withdrawals begin. The withdrawal comes out first; growth is applied to what remains.

Can the required withdrawal fit your monthly paycheck?

An RMD result is useful when it shows whether a legally required withdrawal covers part of the cash you expect to need, but it cannot tell you what you can safely spend every year or what tax the withdrawal creates.

A workable result might cover your baseline spending after you set aside money for taxes. A worrying result is an RMD that forces a sale after a market decline, or exceeds what you need and leaves taxable cash without a job.

Use this quick test: divide the next year's required withdrawal by 12. If that monthly amount is above your baseline spending need, don't automatically make the difference permanent spending; reserve it for taxes, reinvest it in a taxable account, or treat it as optional spending when markets permit.

Account values can fall below the amount originally invested, so an assumed return is only a calculation input, not a promise.

Tolleson Wealth Management uses the RMD as one spending guardrail

The calculator leaves out tax withholding, other income, account-specific withdrawal rules, and the timing of your actual bills. It also cannot decide whether a distribution should pay for ordinary spending, a large purchase, gifts, or remain invested after it reaches a taxable account.

At Tolleson Wealth Management, the first thing we look at is the gap between recurring income and recurring spending. We then place the RMD beside Social Security, pensions, cash reserves, and the investments you would need to sell. Before suggesting a fund sale, we estimate the taxes that sale could create.

That work produces a spending playbook with a baseline amount and a flexible amount. When markets are weak, the flexible portion may be trimmed; after stronger markets or a larger-than-needed RMD, there may be room to spend more or replenish cash.

The December 31 balance is the input that changes everything

Using today's balance can make the estimate wrong because the RMD calculation begins with the account's December 31 value from the prior year. A withdrawal already taken this year does not reduce that starting balance.

Check the year-end statement before entering the number. If an account holds $900K on December 31 but has fallen to $840K by February, entering $840K would understate the first estimated withdrawal by about $2,353 at an age-74 divisor of 25.5.