For a child, an allowance is something that begins the experience of money management. For you, it's a way to reduce a constant asking for money.
Most children are ready for an allowance when they are between five and seven.
The answers may be different for each child, but there are some general rules of thumb you should consider. Choosing the right amount of allowance or deciding how often it should be paid will depend on how much you can afford and your child's age. It's expensive being a kid these days, so don't be too nostalgic when considering the amount. The payment frequency of an allowance will depend on the age and personal preference of your child. The key is to set clear expectations right from the start, and decide together what day best suits your respective needs.