How to create a posting key in SAP

How to create a posting key for FI document postingPosting key in SAP is used to control the entry of a document line item. In SAP a posting key determines the account type, debit and credit of a line item and the screen layout or filed status of the entry screen.

While posting a document to Sap you need to enter a posting key before entering each line items and by that the debit and credit entry of the item will be known to system.

Keys are defined at the client level and can be used for all the company codes created in SAP. Sap has delivered so many standard keys to use. Keys are even created for all of your special general ledger transactions. 

Posting a transaction at item level are controlled by the  posting key and general ledger account. Both controls the account type, debit and credit of the item and screen display.

You can use only those posting keys which are allowed in the document type.

How document type are linked

When you define or use a standard posting key, the account type for the key is always defined (i.e. Customer, Vendor, G/L Account, Assets and Material) in it. Same way in OBA7 while creating a document type you select the account types allowed for that particular document types. If both of your selection in posting key and document types are matching then system allow you to post the document.

How the reverse key is determined

While defining the key we also put the reverse key in it which is used while reversing a particular document initially posted with the original posting key. To get the key assigned, we first create both the keys and then assign it with each other.

We always suggest using standard posting key as delivered by SAP. Do not modify the default SAP keys.

You can create your own keys by using transaction code OB41 or though following path;

Path : SPRO > Financial Accounting > Financial Accounting Global Settings > Document > Line item > Controls > Define Posting keys

What are the posting keys used in SAP

Posting Key Account Type Debit/Credit Type of Posting

1

Customer Debit Invoice

2

Customer Debit Reverse credit memo

3

Customer Debit Bank charges

4

Customer Debit Other receivables

5

Customer Debit Outgoing payment

6

Customer Debit Payment difference

7

Customer Debit Other clearing

8

Customer Debit Payment clearing

9

Customer Debit Special G/L debit

11

Customer Credit Credit memo

12

Customer Credit Reverse invoice

13

Customer Credit Reverse charges

14

Customer Credit Other payables

15

Customer Credit Incoming payment

16

Customer Credit Payment difference

17

Customer Credit Other clearing

18

Customer Credit Payment clearing

19

Customer Credit Special G/L credit

21

Vendor Debit Credit memo

22

Vendor Debit Reverse invoice

24

Vendor Debit Other receivables

25

Vendor Debit Outgoing payment

26

Vendor Debit Payment difference

27

Vendor Debit Clearing

28

Vendor Debit Payment clearing

29

Vendor Debit Special G/L debit

31

Vendor Credit Invoice

32

Vendor Credit Reverse credit memo

34

Vendor Credit Other payables

35

Vendor Credit Incoming payment

36

Vendor Credit Payment difference

37

Vendor Credit Other clearing

38

Vendor Credit Payment clearing

39

Vendor Credit Special G/L credit

40

G/L Account Debit General Ledger Account Debit

50

G/L Account Credit General Ledger Account Credit

70

Asset Debit Debit Asset

75

Asset Credit Credit Asset

80

G/L Account Debit Inventory taking

81

G/L Account Debit Costs

82

G/L Account Debit Inventory Difference

83

G/L Account Debit Pirce Difference

84

G/L Account Debit Consumption

85

G/L Account Debit Change in Stock

86

G/L Account Debit GR/IR Clearing Account

Key 40 and 50 is used most often as these two handles most of the general ledger account in SAP FI document posting.

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