What time does the Taco Bell start serving lunch. kgb answers » Local & Lookup » Restaurants & Nightlife » What time does the Taco Bell start serving lunch. Anecdotal reports suggest that Taco Bell serves lunch from 10 on. For more detailed info, contact one or any of their local branches near you. Taco Bell serves more than 35 million consumers each week in nearly 5,600 restaurants nationwide.