Honestly, it depends on the bench you choose. Most standard outdoor benches, especially wooden, metal, and classic slatted styles, do not come with cushions. They are sold as the frame only, so if you want padding, you will need to buy the cushion separately.
That said, some outdoor benches do include cushions. This is more common with wicker or rattan conversation benches, deep-seating patio benches, storage benches with padded tops, and certain porch swing benches. In those cases, the cushion is usually designed to fit that specific bench, and it may be listed as cushion included in the product details.
There is a reason many brands do not include cushions. Outdoor cushions are exposed to sun, rain, and temperature changes, so they tend to wear out faster than the bench frame. Selling them separately keeps the bench price lower and lets you replace the cushion without replacing the whole piece. It also gives you more freedom to choose a color and pattern that fits your outdoor space.
If you need to buy a cushion, measure the seat length, seat depth, and back height before you shop. Look for outdoor-specific materials like UV-resistant fabric and quick-dry foam, and check for ties or non-slip backing so the cushion stays in place.
Before you buy any bench, read the product description carefully. If you see cushion sold separately, add that to your budget. If you want everything in one box, search for terms like outdoor bench with cushions included or choose a patio set that lists cushions in the package.