CIT Bank's 4.35% Savings Boost Pays 0.85% If Your Balance Dips One Cent Under $5,000

If you keep at least $5,000 in savings and you’ll leave it there, CIT Bank’s new promo is worth a look. If your balance bounces around $5,000, it’s a trap with a nice number on the front.

CIT Bank brought its savings boost back this week with a new code, BOOST60. Doctor of Credit flagged it on November 3. It adds 0.60% to CIT’s Platinum Savings account for six months, which takes the advertised rate to 4.35% APY.

Here’s the catch. Platinum Savings is a tiered account, and the 4.35% only applies “on balances $5,000 or more.” Under that line, the boosted rate is 0.85%. After six months it’s 0.25%.

And it’s not a marginal tier. CIT’s own disclosure says interest is paid “on the entire account balance” at the rate for whatever tier your end-of-day balance lands in. End a day at $4,999.99, and every dollar in the account earns the low rate that day.

The one-cent cliff

We ran six months of interest at CIT’s posted APYs.

At $5,000, the boost earns about $108. At $4,999.99, it earns about $21. That’s an $86 swing for one penny.

Now compare a plain online savings account. Ally lists 3.20% APY, correct as of November 2. Six months at Ally on $5,000 is about $79.

So the math splits cleanly. Park $10,000 and leave it alone, and CIT’s boost earns about $215 in six months against Ally’s $159. CIT wins by $56.

Start at $4,000 and build slowly, and it flips. CIT’s boost earns about $17. Ally earns about $64. Ally wins by $47, and the gap gets wider once CIT drops you to 0.25%.

Smart if you clear $5,000 with room to spare. Dumb if you’re building up to it.

There’s a second thing CIT doesn’t put in the headline. Its standard 3.75% rate is still dated “as of July 1, 2026.” The Fed raised its benchmark rate a quarter point on September 16, to a range of 3.75% to 4%. CIT’s posted standard rate still carries the July date. The boost is a six-month sticker on a rate that sat still through a hike. Bank’s bet: you’ll forget the date it ends.

What to do

Check your low point, not your average. Pull up the last six months of your savings statements and find the lowest end-of-day balance. If it ever dipped under $6,000, a big bill could push you below $5,000. That’s when the cliff bites.

If you clear that bar, open or enroll with BOOST60 and put the end date in your phone calendar the day you do it. CIT says the boost runs six months from account opening. When it ends, compare CIT’s 3.75% against whatever the best flat rate is that week. Move if it loses.

If you don’t clear it, skip the promo and park the money somewhere with one rate for every balance. Our savings calculator will show you the dollar gap, and the best savings accounts page is a starting list.

The detail

CIT’s FAQ says that if it changes its Platinum Savings tiers during the promotion, enrolled customers get the 0.60% added to the new rates. It also says the boosted rate applies to the full enrolled balance, including later deposits. Doctor of Credit notes that existing customers have had mixed luck enrolling earlier versions of this boost. Our interest figures assume the posted APY holds for half a year. CIT’s rates are variable and can change at any time. For more on how banks pass along Fed moves, see how Ally passed along the September hike.

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