This is an important question, and one that can vary depending on the size and age of your business, the industry that you’re in, amongst other factors.

The question you should ask first however, is how much do you want to succeed?

Obviously, spending 80% of your gross annual income isn’t going to be sustainable, and likely won’t guarantee you a big enough return to justify such a spend.

It’s more about smart marketing and investing in the proven methods.

The general rule of thumb is that you should be spending approximately 5%.