The phrase "extra burden" means an additional task, responsibility, or problem that someone has to deal with, on top of the ones they already have. Full definition
You don't have to put extra burden on your pocket to avail such a unique blend of services and the nature's best where the resort is located. (blog.toshaliresort.com)
When you opt for discussion board post buying, you will surely free yourself from extra burden of discussion board post writing. (essaywritingstore.com)
This places extra burdens upon the plaintiff to both start their claim and to argue it in court. (charlesboyk-law.com)