The Overlap Tax
Having two children in college at the same time isn't twice as expensive โ it's exponentially more stressful.
When Greg and Karen originally mapped out college funding, they assumed Tyler would be finishing as Brooke started. A gap year Tyler took closed that buffer to zero. Suddenly both 529 accounts were being drawn simultaneously, and the $42,000 remaining balance would barely cover one more semester for one child.
After taxes, the Stevens bring home roughly $13,800 per month. Mortgage, insurance, property taxes, utilities, groceries, car payments, and basic living consume about $8,500. That leaves $5,300 of monthly breathing room โ but tuition demands $5,667 per month when spread across twelve months. They are, on paper, running a $367 monthly deficit before contributing a single dollar to retirement.
Karen suggested they pause retirement contributions entirely. Greg pushed back hard. They compromised: Greg contributes enough to capture his full employer match (6%), and Karen maintains her mandatory pension contributions. Everything else goes to tuition, funded partly by a home equity line of credit they opened as a pressure valve.
$13,800
Monthly take-home
After federal, state, FICA
$8,500
Fixed monthly expenses
Mortgage, insurance, essentials
$5,667
Monthly tuition cost
$68K spread over 12 months
-$367
Monthly gap
Before any retirement savings
The Hidden Cost of Pausing Retirement
Stopping 401(k) contributions for four years at age 54 doesn't just lose the contributions โ it loses the compounding. A $15,000 annual contribution growing at 7% for 11 years becomes roughly $49,000. Pause for four years and you lose over $95,000 in projected retirement wealth.
The Reality Check
The Stevens are literally spending more than they earn when tuition is included โ and they haven't even addressed the retirement gap yet.
Try It Yourself
Model your own 529 drawdown timeline to see when funds run out