How Does an Accounting System Work?

The financial transactions of any accounting system can be grouped into four major accounting cycles: Revenue, Purchase, Payroll, and General Journal.

Four Main Accounting Cycles

Accounting transactions in the form of sales invoices, receipts, purchase invoices, checks, and payroll entries are posted to the appropriate journals. Simultaneously — as a form of internal control — these postings are recorded in the general ledger, or “GL”. The GL accumulates all transaction activity, where it is organized by account class.

Various reports, including financial statements, can be prepared from the data collected in the GL.  Corrections or necessary adjustments can be made to the general ledger by creating adjusting journal entries, posted to the general journal.

1. Revenue Cycle

Order Entry. Invoices entered through direct entry, sales orders, or a point-of-sale (POS) system, such as a cash register, are posted to the sales journal.  These entries also accumulate on the accounts receivable ledger, organized by customer.  If the business maintains an inventory, the posting of sales also affects the inventory ledger. Finally, all sales journal activity is also posted to the GL.  A discussion of your revenue cycle should be covered in your revenue procedures.

Cash Receipts / Deposits. Receipts on sales and other bank deposits are posted to the cash receipts journal.  Sales receipt information also accumulates on the accounts receivable ledger, organized by customer.  These postings are also entered on the bank account ledger.  Finally, all cash receipts journal activity is also posted to the GL.

Accounts Receivable. Accounts Receivable is a separate journal that records both sales and cash receipt data by customer.  The data comes from the postings to the cash receipts journal and the sales invoice journal.

2. Purchase Cycle

Purchase Orders / Purchasing. Invoices entered through direct entry, or through purchase orders, are posted to the purchase journal.  These entries also accumulate on the accounts payable ledger, organized by vendor.  If the business maintains an inventory, the posting of purchases also affects the inventory ledger.  Finally, all purchase journal activity is posted to the general ledger.

Cash Disbursements / Checks. Payments on account or for expenses are posted to the cash disbursement journal.  Payment on account information also accumulates on the accounts payable ledger, organized by vendor; these postings are also entered on the bank account ledger.   Finally, all cash disbursement journal activity is posted to the general ledger.

Accounts Payable. Accounts Payable is a separate journal that records both sales and cash receipt data by vendor.  The data comes from the postings to the cash disbursement journal and the purchase journal.

3. Payroll Cycle

Payroll data by employees are entered into the payroll journal.  These postings are also entered in the cash disbursements journal and the payroll ledger.  Finally, all payroll journal activity is also posted to the GL.

4. General Journal Cycle

Corrections or adjustments to the above major transaction cycles can be made through adjusting journal entries, posted directly to the general ledger. These are also compiled in a separate journal, known as the “general journal”.

How Does “Posting” Work?

The specific postings, as outlined in the cycles above, do not necessarily take place as separate steps, especially in computerized environments.  There are only two basic posting methods in computerized accounting systems: real-time and batch posting.

In real-time posting, the source transaction (check, bill, payment, receipt, etc.) is posted to the specific journal and any related subsidiary ledger (e.g., accounts receivable, accounts payable, inventory) and is simultaneously posted to the general ledger.

In batch posting, the journals and subsidiary ledgers are posted, but entries are not yet posted to the general ledger.  Posting these journals to the general ledger is done separately.  Typically, a group of transactions (often a full day’s worth) is entered.  Later, after the journals are reviewed for accuracy, this entire day’s group, or “batch”, is posted to the general ledger.

To understand this posting process better, it would be helpful to follow specific transactions through a sample company.  First, however, we need to define various accounting terms and concepts.

Accounting Terms and Concepts

Double-Entry Accounting

We can thank the 14^th and 15^th century Italian merchants for developing the double-entry system of accounting that we still use today.  It is widely believed that Benedetto Cotrugli (aka, Benedikt Kotruljevic) was the first to document this concept of double-entry accounting (in his accounting policies and procedures, perhaps?).  In 1458, he wrote Delia Mercatura et del Mercante Perfetto (Of Trading and the Perfect Trader), which included a brief chapter describing many of the features of double-entry accounting.

In 1494, Luca Pacioli, from San Sepulcro in medieval Tuscany, published the Summa de Arithmetica‘s 36 short chapters on bookkeeping (entitled De Computis et Scripturis, or “Of Reckonings and Writings”) so the subjects of the Duke of Urbino could learn how to conduct business and provide the trader with a fast, accurate method to determine his assets and liabilities.

For many centuries before this, commercial transactions had been recorded — journalized — on paper, papyrus, or clay tablets.  However, these journals provided only totals of transaction groupings. It was the Italians who first recognized that it is impossible for a business transaction to occur without affecting at least TWO accounts. There can never be only one effect from a transaction — there has to be balance.

An Italian farmer sells wood to a shipbuilder for 400 ducats. To account for this transaction, he would record, “wood sale – 400 ducats”. His “sales” account has increased by 400 ducats. But, what else has happened?  What other account was affected? His “cash” account also increased by 400 ducats.

What if he sells his wood to the shipbuilder on credit and receives no cash? In this case, it’s his “accounts receivable” account that increases by 400 ducats.

There Are Always Two Sides – at Least – to Every Transaction

Later, when the shipbuilder pays his debt to the farmer, the farmer records an increase in his cash account and a decrease in his accounts receivable by 400 ducats each.  You can see that an integral feature of the double-entry method is that transactions must equal. At the time, this new method was heralded as an astounding discovery and was described as “a magic mirror, in which the adept sees both himself and others.”

Today, double-entry bookkeeping is used for recording a transaction in two or more different places, or ledger accounts.  This practice simplifies finding errors since the totals of both ledger accounts should agree.

Debits = Credits

Bookkeeping entries are divided into debits and credits. The debit side is typically the left side of the ledger page and credits are on the right.  The origin of the words “debit” and “credit” come from the simple concept: “who owes you” and “to whom you owe”.

Debits are transactions relating to purchases, expenses, or increases in an organization’s assets. Credits are transactions related to revenues, or an increase in the firm’s equity and liabilities. Recording a transaction requires a debit and a credit entry.  If the entries are correctly recorded, the totals on both sides of the ledger agree.

The double-entry bookkeeping method — listing debits in one column and credits in the other — requires that the debit and credit columns add up to zero. The double-entry bookkeeping method is still the basis for tracking financial affairs, almost six centuries .   The following list illustrates the effect of posting a debit or credit entry on each major account type:

These account types are the general account classifications used in all accounting systems.  They are also used to organize the general ledger, from which financial statements are developed.  Your accounting policies and procedures should take into account the main accounting cycles, accounting methods, and accounting terms to guide the operation of your accounting system.

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Originally published in 2010 by Bizmanualz, Inc. under the title How Does an Accounting System Work?. All rights reserved. Reproduction permitted with attribution only. www.bizmanualz.com