Fifth Third Bancorp absorbed nearly 600,000 Comerica customers and 293 bank branches over Labor Day weekend, completing a merger that makes it the ninth-largest bank in the country with more than $300 billion on its balance sheet. The systems conversion is finished. Whether ordinary customers and investors actually benefit is the question that now takes over.

What just happened

On February 1, the two banks formally joined. Over Labor Day weekend, Fifth Third completed the technical migration, moving former Comerica customers in Arizona, California, Florida, Michigan and Texas onto its own platforms. That's the part that tends to go wrong in bank mergers: mismatched software, lost direct deposits, frozen accounts. Fifth Third says it went smoothly.

Former Comerica customers now have access to Fifth Third's full product lineup, including Early Pay (which lets direct-deposit customers access their paychecks up to two days early) and Extra Time (which gives a grace window before overdraft fees hit). They also get access to roughly 1,500 branches and 21,300 ATMs. In Michigan, where Fifth Third already leads in retail deposits statewide, former Comerica customers now have 60% more branch locations available to them.

Where Fifth Third is actually placing its bets

Texas is the real story. Fifth Third now operates 107 financial centers in the state and plans to spend nearly $1 billion over five years, adding 150 more locations by 2029. By 2030, the bank expects more than half of its roughly 1,750 total branches to sit in Texas, the Southeast, Arizona and California, all of which are among the fastest-growing population markets in the country.

The early numbers from the Comerica territory look encouraging. Fifth Third pulled in $2.5 billion in consumer deposits from its Southwest marketing push. A payments platform called Newline added $2.1 billion in deposits, and fee revenue on that platform jumped 35% year over year. The bank's net interest margin (the gap between what it earns on loans and what it pays depositors, a core measure of profitability) widened slightly to 3.36%. Loan losses also stayed low, with net charge-offs falling to their best level since mid-2023.

The bill that hasn't cleared yet

None of this came without cost. Merger-related charges cut $155 million from after-tax income in just the second quarter. Noninterest expenses were still up 67% compared to the same period a year ago, even after falling 12% from the first quarter as integration winds down. Management says it has already spent about 65% of its expected total merger costs for the year, which implies the heaviest charges are mostly behind it, though not entirely.

The bank's capital cushion also thinned. The ratio measuring financial resilience (the share of equity a bank holds against its risk-weighted assets) sat at 9.93% at last count, down from 10.58% a year earlier, reflecting nearly $1 billion in pre-tax merger-related hits. Fifth Third did not buy back any of its own shares in the first half of 2026, a signal that management is prioritizing rebuilding that buffer before returning cash to shareholders.

There's also a funding quirk worth watching. To cover a seasonal dip in commercial deposits, Fifth Third leaned on $3.3 billion in short-term borrowing from the Federal Home Loan Bank system. That's a common tool, but it's also a reminder that funding costs can spike while a bank is still digesting a large acquisition.

The bigger pattern

What Fifth Third is doing is a bet on geography as much as banking. The Sun Belt and Texas are growing. The Midwest, where Comerica was heavily rooted, is not. By planting flags in Phoenix, Dallas and Tampa while cementing its lead in Detroit, Fifth Third is repositioning for where American economic and population weight is shifting over the next two decades.

Whether it works depends partly on execution and partly on interest rates. If rates stay elevated, the bank earns more on loans. If a slowdown hits Texas or Florida harder than expected, those 150 planned new branches become stranded costs. The integration is done. The real test runs from here.