Dictionary / Folio
What does Folio mean in accounting?
Quick definition
GeneralA reference to a page number for the source of an entry or posting. This term guides how bookkeepers record, classify, and explain related transactions in routine financial reporting.
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Examples
An interiors client posts with folio SJ18
You run a picture-framing shop. On March 6 you record $640 from an interiors client for a gallery-wrap order on page 18 of the sales journal. When you post the debit to accounts receivable and the credit to Framing income, you write SJ18 in each Folio column. That number is the folio: a page pointer back to the journal, not a new account. Open page 18 later and you should see that client and both postings.
A blank Folio column blocks the search
You run a locksmith shop. On August 19 you write check 1844 to a key supplier for $312 of key blanks on page 9 of the cash disbursements journal. You post $312 to Parts expense and leave the Folio column empty. In October a parts count is short and you want the source of that $312, but the general ledger shows the amount and the date, not which journal page or which check. Write the page number (or the check number if that is your source) in Folio before you leave the line.
Why it matters
A folio is the page-number reference that ties a general ledger posting back to the journal page or source document that created it. You write it in the Folio column when you post, so anyone can open that page later. You will not see a labeled Folio column in QuickBooks Online or Xero most months; those apps keep the source transaction attached for you. The word still matters if you keep paper books, convert an old ledger, or type a journal entry and leave the reference blank. Skip it and a later question about the line becomes a hunt through binders. This is not a hotel guest bill and not a spreadsheet tab.
Further reading
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What is Folio in bookkeeping?
A reference to a page number for the source of an entry or posting.
When should I use Folio?
Use Folio when the transaction facts match its definition and you need the ledger and financial statements to reflect the correct account and period.
What is a common mistake with Folio?
Folio is used for folio entries, while F.O.B covers a related but distinct bookkeeping purpose. Review both terms before posting unusual transactions. A common mistake is applying it by label only instead of checking the underlying transaction details.