How Long to Bake Chicken Thighs at 400°F

The quick answer

At 400°F, boneless chicken thighs often need about 20–30 minutes, while bone-in thighs commonly need about 35–50 minutes. Treat those times as planning ranges, not a doneness test. Thickness, starting temperature, pan crowding, and oven accuracy all change the clock.

How to bake them evenly

Heat the oven fully to 400°F and use a rimmed sheet pan or shallow baking dish. Pat the thighs dry, rub lightly with oil, and season with salt, pepper, and your preferred garlic, paprika, or herbs. Arrange the chicken in one layer with space between pieces; keep skin-on thighs skin-side up. A packed pan traps steam and slows browning, so divide the batch between two pans if needed.

• For bone-in, skin-on thighs, leave the skin uncovered.
• For boneless thighs, spread folded pieces to an even thickness.
• Start checking before the earliest expected finish time.

Check temperature, not color

For boneless thighs, begin checking after about 20 minutes; for bone-in thighs, begin near 35 minutes. Slide an instant-read thermometer into the thickest meaty area without touching bone. Chicken needs to reach at least 165°F (74°C). Size and pan choice matter more than the clock, so check large and small pieces separately. If some pieces finish sooner, remove them to rest while the others continue roasting.

For crispier skin

Dry skin and a hot, uncrowded pan create better browning. Season the skin itself instead of putting a thick, wet sauce on it at the beginning. If the chicken is done but looks pale, briefly broil just long enough to deepen the color, keeping a close watch to prevent burning. For a sticky glaze, brush it on near the end so its sugars don't scorch during the entire bake.

Flavor and timing adjustments

For juicy, well-seasoned thighs, use enough salt for the amount of chicken and let the pieces rest for about five minutes after baking. Bone-in skin-on pieces generally take longer than boneless ones. If the potatoes or vegetables sharing the tray need more time, start them earlier rather than overcooking the thighs. A squeeze of lemon, pan juices, or chopped herbs makes a brighter finish without hiding the roasted flavor.

• Add sugary glazes near the end of cooking.
• Let finished pieces rest while larger ones catch up.
• Serve with a fresh, acidic finish for contrast.

Leftovers

Refrigerate cooked chicken within 2 hours, or within 1 hour when the surrounding temperature is above 90°F (32°C). General cooked leftovers keep 3–4 days in the refrigerator. Reheat leftovers to 165°F (74°C).