What is a subledger?
A detailed ledger behind a single control account, such as receivables or fixed assets.
Definition
A subledger is the detailed list that sits behind one control account. It is the pieces, such as each customer balance behind receivables, not the one total on the statements.
Each row is one customer invoice, one vendor bill, or one asset. The rows must add to the control account in the general ledger.
Where it shows up
Balance Sheet: Related to the control account the subledger supports.
P&L: Related to nothing extra unless that subledger is income or expense.
Cash flow: Related to nothing extra.
See also: General Ledger · Account Reconciliation · Posting
When you look at the Balance Sheet, you see one accounts receivable total or one accounts payable total. The subledger is the customer-by-customer or vendor-by-vendor list behind that total.
The Income Statement usually stays silent on this detail. An income or expense subledger is less common, and most shops keep that detail in the main income and expense accounts.
The Statement of Cash Flows does not show the subledger either. Cash is a different account, proved to the bank statement, not to the receivable or payable list.
If you open the software, the subledger is often the open invoice list or the open bill list. Aging reports are views of that same list, bucketed by how late each row is.
How it works
A control account holds one total. The subledger holds the rows that make that total.
When Maya invoices a cafe, the invoice is a new row in the receivable subledger. The control account rises by the same amount.
When the cafe pays, that row closes. The control account falls, and cash rises.
If a row stays open, it is still owed. The aging report is how you read those open rows by age.
The two records must match. If the subledger adds to $800 and the control account shows $850, something posted to one side and not the other.
A bank reconciliation is not a subledger. It proves cash to the bank, while a subledger proves a control account to its own detail.
Fixed assets work the same way. Each machine or build-out is a row, and the asset control account must equal the list.
You post into both layers from the same event. You do not type a new total into the control account and hope the list catches up.
Example
Maya's florist keeps a list of each cafe invoice behind accounts receivable. The cafe's $400 bouquet invoice is one row.
Two other shops owe $250 and $150. The subledger has three invoices totaling $800.
The accounts receivable control account must also show $800. If it shows $800, the Balance Sheet receivable is supported by those three files.
If the $150 row is missing from the list but still in the control account, the statement is $150 too high. Maya finds the stray posting and either adds the invoice to the list or clears the extra $150.
When the cafe pays the $400, that row drops to zero. The control account falls to $400, which is the $250 plus the $150 still open.
Common mix-ups
A subledger is not the general ledger. The general ledger is the full set of accounts.
The subledger is the detail behind one of those accounts. You need the total and the list.
A subledger is not an aging report. Aging is a view of the open rows by how late they are.
The subledger is the list itself. Aging is how you sort it.
A subledger is not a source document. The cafe invoice PDF is the file behind one row.
The subledger is the running list of those rows. The file is the proof for a single line.
The open receivable list and the open payable list are different subledgers. Mixing them hides who owes you and whom you owe.
Related terms
- General Ledger: The master record of every account and every posted transaction.
- Accounts Receivable Aging: A report bucketing open invoices by how long they have been outstanding.
- Accounts Payable Aging: A report bucketing unpaid vendor bills by how long they have been outstanding.
- Fixed Asset Register: The subledger listing every capitalized asset the business owns.
- Account Reconciliation: Proving that a ledger balance agrees to independent support.
- Posting: Recording a journal entry into the general ledger accounts.
- Trial Balance: A listing of every ledger account balance, used to check that debits equal credits.
- Audit Trail: The traceable chain from a reported number back to its source document.