For years, the high-yield savings account was the obvious place for cash. Then Treasury bill yields rose, and suddenly the boring government bond pays as much as the best savings account, with a tax advantage on top. In November 2026, top high-yield savings accounts pay around 4.2% to 4.4%, while short-term Treasury bills pay in a similar range, and the choice between them is no longer obvious. Here is how they actually compare.

Yield: Nearly a Tie, With a Twist

On headline yield, the two are close. The best high-yield savings accounts in November 2026 pay about 4.2% to 4.4% APY, and the very best promotional rates reach 5% with conditions attached. Treasury bills of four to thirteen weeks pay a comparable yield, and that yield is locked in when you buy, while a savings account rate can drop at any time. If rates fall, the T-bill holder keeps the higher yield until maturity. If rates rise, the savings account holder benefits immediately, while the T-bill holder waits for the bill to mature.

The Tax Edge Nobody Talks About

Treasury bill interest is exempt from state and local income tax, which is a real advantage in high-tax states. If you pay 5% state tax, a 4.3% T-bill yield is equivalent to about 4.5% from a savings account, and at 9% state tax the gap widens further. Savings account interest is taxed at both the federal and state level, with no exemption. For savers in California, New York or New Jersey, this single difference can make T-bills the better choice even when the headline rate is slightly lower.

Access, Safety and the Practical Choice

Both are extremely safe: savings accounts are FDIC-insured up to $250,000, and T-bills are backed by the US government. The real difference is access. A savings account lets you withdraw instantly, which makes it the right home for an emergency fund. T-bills lock your money until maturity, from four weeks to a year, and selling early means using the secondary market. The practical answer is to split your cash: keep your emergency fund in a high-yield savings account, and park money you will not need for a month or more in a T-bill ladder, where the tax edge and the locked yield work in your favour.

Building a T-Bill Ladder Step by Step

A T-bill ladder turns a single purchase into a steady stream of maturing cash. The idea is simple: split your money into equal parts and buy bills with staggered maturities, so that a portion matures every few weeks and you can either spend it or reinvest it at the current rate. Start with four equal parts and buy four-week, eight-week, thirteen-week and twenty-six-week bills. When the four-week bill matures, reinvest it in a new twenty-six-week bill, and repeat. After a few months, you hold a ladder where a bill matures every month, and your average yield tracks the market.

You can build a ladder through TreasuryDirect, the government's own site, or through a brokerage that offers automatic T-bill reinvestment, which is simpler. Fidelity, Schwab and Vanguard all let you buy T-bills with no fees and set them to auto-roll, which means the ladder maintains itself. The minimum purchase is $100, so a ladder is accessible with a few hundred dollars. It takes an hour to set up and then runs itself, and it is the best way to hold cash that you will not need for a few weeks but want working harder than a savings account.

Cash is not supposed to be exciting, but in 2026 it finally pays. Use a high-yield savings account for money you might need tomorrow, and Treasury bills for money you can commit for a few weeks, especially if you live in a high-tax state. Together they beat either one alone, and neither one requires you to take any real risk.