"Most, if not all, financial rules of thumb assume you have kids," says Jay Zigmont, a certified financial planner and author of "Portraits of Childfree Wealth."
Take the possibility of kids out of the equation, and "the whole foundation of your financial plan changes."
If you're still aiming for traditional financial landmarks, such as retiring at 65, you may be following someone else's financial "life script" that doesn't match up with your goals, Zigmont says.
Here are three strategies Zigmont, who specializes in advising childfree clients, says childfree people can employ, even though they deviate from the standard advice.
And to be clear, just because you're not spending your money on children doesn't mean it's OK to abandon core financial principles altogether.