What is Posting Key?

What is Posting Key?

Posting key is a two-digit alphanumeric number which controls the entry of line items.  There are different standard postings provided by SAP specific for different transactions.

For Eg:

40 – G/L Debit

50 – G/L Credit

01 – Customer Invoice

11 – Customer Credit memo

21 – Vendor Credit memo

31 – Vendor Payment

Posting keys determines to which to which account the transaction is going to be posted, which side of the account i.e. debit/credit

It is a normal practice not to change default posting keys, as very rarely you would require additional posting keys.