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.
It's also important to recognize that, depending on the business and industry, bonuses can make up a substantial portion of your employees' income. For example, in the US, the average bonus pay for hourly workers is around 5.6% of their salaries, which equates to over a month's wages.
