The latest 6-month Treasury bill auction cleared at a yield above 5%, and for anyone with cash parked in a regular savings account earning 0.4%, that gap is real money slipping away every month.
Here's the catch nobody mentions: you can't just buy T-bills the way you buy a stock.
The auction system runs on a schedule, and the minimum bid at TreasuryDirect is $100, which means the barrier is lower than most people assume.
A reader in Ohio earning 0.35% on $15,000 in a big-bank savings account would collect about $52 a year.
The same money in a 6-month bill at 5.1% would earn roughly $382.
The auction itself is simpler than it sounds.
Every week, the government sells new debt to fund itself, and investors bid.
You submit what's called a noncompetitive bid, which basically means you accept whatever yield the auction sets.
First, T-bills don't pay interest the way a savings account does.
You buy a $1,000 bill for something like $975, and at maturity you get the full $1,000 back.
Second, your money is locked until the bill matures — 4, 8, 13, 17, 26, or 52 weeks.
Pull it out early and you have to sell on the secondary market, where the price can move against you.
T-bill interest is exempt from state and local income tax, which matters more if you live somewhere with a hefty state rate.
A Californian in a high bracket gets a bigger effective advantage than someone in Florida with no state income tax at all.
TreasuryDirect's website looks like it was built during the dial-up era, and transferring money in takes a few days.
Some people also worry about tying up cash they might need for an emergency.
That's a fair concern — keep your emergency fund liquid and only ladder money you won't touch for a few months.
One more thing worth knowing: yields move around.
The 5% headline from this auction doesn't lock in for future auctions.
If the Fed cuts rates later this year, the next batch of bills could pay meaningfully less.
Nobody knows the exact path, and anyone who claims to is guessing.
The practical move for most households is a simple ladder.
Buy a 4-week bill this month, a 13-week bill next month, and stagger them so something matures regularly.
When one matures, roll it into a new one.
You keep access roughly every few weeks while capturing rates that beat most savings accounts.
My take: the gap between what big banks pay savers and what the government pays is one of the quietest ripoffs in personal finance, and it costs the average household hundreds a year.
If you've got cash sitting idle and you won't need it for a few months, spending twenty minutes on TreasuryDirect is probably the highest-paid twenty minutes you'll find this week.
Final Thoughts
Just don't chase the rate with money you might need next Tuesday.