SAP Table T001B

SAP T001B table stores permitted posting period settings used in SAP Financial Accounting. It controls which accounting period are open or closed for postings, based on the posting period variant, account type, time intervals and fiscal year.

When posting periods are open or closed using transaction code OB52, the permitted posting period settings are updated in the T001B table.

In production SAP system, normally the current accounting period is kept for day-to-day postings, while other periods are remain closed. During month-end or year-end activities, previous period or special periods can also be open when required for accounts adjustment.

T001B table allows posting periods to be controlled for different account types:

• + – All Account types
• A – Assets
• D – Customers
• K – Vendors
• M – Materials
• S – G/L Accounts

For example:

• Assume Company Code: 1010
• Posting Period Variant: P001
• Posting Date: 01.10.2026
• Fiscal year: January to December

When a vendor invoice is posted using transaction code FB60 with a posting date 01.10.2026, SAP determines the posting period based on posting date and fiscal year variant.

Since the fiscal year follows January to December, the posting data 01.10.2026 corresponds to posting period 10 and Fiscal year 2026

The system check the permitted posting period settings maintained in T001B for the posting period variant P001.

If period 10/2026 is open for the required account type, SAP allows the vendor invoice to be posted. If posting period is closed, the system prevents the posting and displays a posting period related error message as posting period was not opened.

SAP Consultants, users & support team uses T001B table to check open and close posting periods, verify special-periods, analyze account type and account range restrictions and troubleshoot posting period related errors.