READY two in five (39%) of US adults They have one side hustle — and despite the fact that many use the extra cash they earn to pay essential bills, not all 9-5 the employer is as supportive as the next.

That's why side hustle expert and remote work said attorney Daniella Flores CNBC Do it that employees should look closely at their employer's policy on the subject—and potentially consult with an employment attorney if they are unsure about how much information should be disclosed.

However, some employers may encourage their employees to start their own side hustle. Ross Buhrdorf, CEO of ZenBusinessa fully remote company that offers an all-in-one platform and guidance for small business owners, is one of them.