An annual bonus of 5-10% of your yearly salary is standard in a lot of industries, just as a 5-10% annual raise is considered standard. However, if you work on commission, you may see a significantly higher percentage. Your industry, company revenue, location, and level also heavily inform what's expected.
Suppose that your target bonus is 20 percent of a base salary of $100,000 and you performed at the maximum performance level. That means you would earn 200 percent of that 20 percent bonus, or 40 percent. This would result in a $40,000 check ($100,000 x 20%(your target bonus) X 200% (payout level)).