If you have been babysitting for the same family for a long time, and still have not received a raise, you may be getting frustrated. It may seem easier to simply stop accepting jobs from this family, in order to provide your services to other, better-paying families. But it simply may not have occurred to the family that they should offer a pay increase to you, to show their appreciation for the good work that you do and your long-time dedication to them. You should ask for a pay increase before deciding to move on.
Ask the parents for a performance review, if you have been babysitting for the family for one year or more. Explain that you consider this your job and would like to receive feedback on your performance, as any other employee would.
Express your desire for a raise after you receive your performance review. Use examples of things that you do well on the job to support your reasoning for a rate increase.
Explain that the average babysitting rates are between $10 to $18 per hour, if you are being paid below average rates. Add that you enjoy spending time with the children, but if you don't receive a raise, you will have to make yourself available for higher-paying jobs. Most parents will consider a couple of extra dollars an hour to be a small price to pay to keep a good babysitter.