Is digital printing less expensive than offset printing?

It depends on your printing needs.

Digital printing is more cost effective for short run, custom, or one time projects. Or if you plan to make changes on a regular basis.

If you will be printing large quantities of the same design on a regular basis (EX: Flyers, letterhead, folders) then offset printing is cheaper.

Gang run printing is a method used by some printing companies. They use a common printing sheet in an effort to reduce printing costs and paper waste. This process makes offset printing less expensive.