Accounts, debits and credits
DEBITS AND CREDITS: Without a doubt, you have heard or seen a reference to debits and credits; perhaps you have had someone "credit" your account or maybe you have used a "debit" card to buy something. Debits (abbreviated "dr") and credits (abbreviated "cr") are unique accounting tools to describe the change in a particular account that is necessitated by a transaction. In other words, instead of saying that cash is "increased" or "decreased," we say that cash is "debited" or "credited." This method is again traced to Pacioli, the Franciscan monk who is given credit for the development of our enduring accounting model. Why add this complexity -- why not just use plus and minus like in the previous chapter? You will soon discover that there is an ingenious answer to this question!
Understanding the answer to this question begins by taking note of two very important observations (the observations are linked to a pop-up window that includes additional explanatory material that may aid your understanding):
and
(2) for every transaction, debits = credits
As you can tell by reviewing the illustration, the "+/-" system lacks internal consistency. Therefore, it is easy to get something wrong and be completely unaware that something has gone amiss. On the other hand, the debit/credit system has internal consistency. If one attempts to describe the effects of a transaction in debit/credit form, it will be readily apparent that something is wrong when debits do not equal credits. Even modern computerized systems will challenge or preclude any attempt to enter an "unbalanced" transaction that does not satisfy the condition of debits = credits.
THE DEBIT/CREDIT RULES: At first, it is natural for the debit/credit rules to seem confusing. However, the debit/credit rules are inherently logical. But, memorization usually precedes comprehension. So, you are well advised to memorize the "debit/credit" rules now. If you will thoroughly memorize these rules first, your life will be much easier as you press forward with your studies of accounting.
ASSETS/EXPENSES/DIVIDENDS: As shown at left, these three types of accounts follow the same set of debit/credit rules. Debits increase these accounts and credits decrease these accounts. These accounts normally carry a debit balance. To aid your recall, you might rely on this slightly off-color mnemonic:
LIABILITIES/REVENUES/EQUITY: These three types of accounts follow rules that are the opposite of those just described. Credits increase liabilities, revenues, and equity, while debits result in decreases. These accounts normally carry a credit balance.
ANALYSIS OF TRANSACTIONS AND EVENTS: You now know that transactions and events can be expressed in "debit/credit" terminology. In essence, accountants have their own unique shorthand to portray the financial statement consequence for every recordable event. This means that as transactions occur, it is necessary to perform an analysis to determine (a) what accounts are impacted and (b) how they are impacted (increased or decreased). Then, debits and credits are applied to the accounts, utilizing the rules set forth in the preceding paragraphs.
Usually, a recordable transaction will be evidenced by some "source document" that supports the underlying transaction. A cash disbursement will be supported by the issuance of a check. A sale might be supported by an invoice issued to a customer. Receipts may be retained to show the reason for a particular expenditure. A time report may support payroll costs. A tax statement may document the amount paid for taxes. A cash register tape may show cash sales. A bank deposit slip may show collections of customer receivables. Suffice it to say, there are many potential source documents, and this is just a small sample. Source documents usually serve as the trigger for initiating the recording of a transaction. The source documents are analyzed to determine the nature of a transaction and what accounts are impacted. Source documents should be retained (perhaps in electronic form) as an important part of the records supporting the various debits and credits that are entered into the accounting records.
A properly designed accounting system will have controls to make sure that all transactions are fully captured. It would not do for transactions to slip through the cracks and go unrecorded. There are many such safeguards that can be put in place, including use of prenumbered documents and regular reconciliations. For example, you likely maintain a checkbook where you record your cash disbursements. Hopefully, you keep up with all of the checks (by check number) and perform a monthly reconciliation to make sure that your checkbook accounting system has correctly reflected all of your disbursements. A business must engage in similar activities to make sure that all transactions and events are recorded correctly. Good controls are essential to business success.
DETERMINING AN ACCOUNT'S BALANCE: The balance of a specific account can be determined by considering its beginning (of period) balance, and then netting or offsetting all of the additional debits and credits to that account during the period. Earlier, an illustration for a Cash account was presented. That illustration was developed before you were introduced to debits and credits. Now, you know that accounts are more likely maintained by using the debit/credit system. So, the Cash account is repeated below, except that the increase/decrease columns have been replaced with the more traditional debit/credit column headings. A typical Cash account would look similar to this illustration:
On the other hand, some may assume that a credit always increases an account. This incorrect notion may originate with common banking terminology. Assume that Matthew made a deposit in his checking account at Monalo Bank. Monalo's balance sheet would include an obligation ("liability") to Matthew for the amount of money on deposit. This liability would be credited each time Matthew adds to his account. Thus, Matthew is told that his account is being "credited" when he makes a deposit. On your books you would debit (decrease) a payable account (liability).
THE JOURNAL
KEEPING IT SIMPLE: Most everyone is intimidated by new concepts and terminology (like debits, credits, journals, etc.). But, learning can be made quite simple by relating new concepts to preexisting notions that are already well understood. So, think: what do you know about a journal (not an accounting journal, just any journal)? It's just a log book, right? A place where you can record a history of transactions and events -- usually in date (chronological) order. But, you knew that.
Likewise, an accounting journal is just a log book that contains a chronological listing of a company's transactions and events. However, rather than including a detailed narrative description of a company's transactions and events, the journal lists the items by a "form of shorthand notation." Specifically, the notation indicates the accounts involved, and whether each is debited or credited. Remember what was said at the beginning of the chapter: "The system must be sufficient to fuel the preparation of the financial statements, and be capable of maintaining retrievable documentation for each and every transaction. In other words, some transaction logging process must be in place." The journal satisfies the need for this logging process!
The general journal is sometimes called the book of original entry. This means that source documents are reviewed and interpreted as to the accounts involved. Then, they are documented in the journal via their debit/credit format. As such the general journal becomes a log book of the recordable transactions and events. The journal is not sufficient, by itself, to prepare financial statements. That objective is fulfilled by subsequent steps. But, maintaining the journal is the point of beginning toward that end objective.
ILLUSTRATING THE ACCOUNTING JOURNAL: The following illustration draws upon the facts for the Xao Corporation (linked to earlier in this chapter, and at the end of the previous chapter). Specifically it shows the journalizing process for Xao's transactions. You should review it carefully, specifically noting that it is in chronological order with each transaction of the business being reduced to the short-hand description of its debit/credit effects. You will also note that each transaction is followed by a brief narrative description; this is a good practice to provide further documentation. For each transaction, it is customary to list "debits" first ( flush left), then the credits (indented right). Finally, notice that a transaction may involve more than two accounts (as in the January 28 transaction below); the corresponding journal entry for these complex transactions is called a "compound" entry.
As you review the general journal for Xao, note that it is only two pages long. An actual journal for a business might consume hundreds and thousands of pages to document its many transactions. As a result, some businesses may maintain the journal in electronic form only. As you review Xao's general journal, notice that you can get a little help with the debit/credit rules by clicking on the account name within the journal. This helpful tool is maintained throughout the remainder of the book.


SPECIAL JOURNALS: First, the illustrated journal was referred to as a "general" journal. All transactions and events can be recorded in the general journal. However, a business may sometimes use "special journals." Special journals are totally optional; they are typically employed when there are many redundant transactions. Thus, a company could have special journals for each of the following: cash receipts, cash payments, sales, purchases, and/or payroll. These special journals do not replace the general journal. Instead, they just strip out recurring type transactions and place them in their own separate journal. The transaction descriptions associated with each transaction found in the general journal are not normally needed in a special journal, given that each transaction is redundant in nature. Without special journals, you can well imagine how voluminous a general journal could become. But, for learning purposes, let's just rely on the general journal to accomplish our goals.
PAGE NUMBERING: Second, notice that the illustrated journal consisted of two pages (labeled page 1 and page 2). Although the journal is chronological, it is helpful to have the page number indexing for transaction cross-referencing and working backward from financial statement amounts to individual transactions.
BUT, WHAT ARE THE ACCOUNT BALANCES?: The general journal is a great tool to capture transaction and event details, but it certainly does nothing to tell a company about the balance in each specific account. For instance, how much cash does Xao Corporation have at the end of January? One could go through the journal and net the debits and credits to Cash ($25,000 - $2,000 + $4,000 - $500 + $4,800 - $5,000 = $26,300). But, this is tedious and highly susceptible to error. It would become virtually impossible if the journal were hundreds of pages long. A better way is needed. This is where the general ledger comes into play.
THE GENERAL LEDGER
INTRODUCING THE LEDGER CONCEPT: As you just saw, the general journal is, in essence, a notebook that contains page after page of detailed accounting transactions. In contrast, the general ledger is, in essence, another notebook that contains a page for each and every account in use by a company. The ledger account for Xao would include the Cash page as illustrated at right. Xao's transactions utilized all of the following accounts:
* Cash
* Accounts Receivable
* Land
* Accounts Payable
* Notes Payable
* Capital Stock
* Service Revenue
* Advertising Expense
* Utilities Expense
POSTING: Before diving into the details of each account, let's consider what we are about to do. We are going to determine the balance of each specific account by posting. To do this, we will copy ("post") the entries listed in the journal into their respective ledger accounts. In other words, the debits and credits in the journal will be accumulated ("transferred"/"sorted") into the appropriate debit and credit columns of each ledger page. Here is an illustration of posting to the Cash account. A similar process would occur for each of the other accounts:

STEP 1: Each transaction is analyzed to determine the accounts involved
STEP 2: A journal entry is entered into the general journal for each transaction
STEP 3: Periodically, the journal entries are posted to the appropriate general ledger pages
The trial balance
TRIAL BALANCE: After all transactions have been posted from the journal to the ledger, it is a good practice to prepare a trial balance. A trial balance is simply a listing of the ledger accounts along with their respective debit or credit balances. The trial balance is not a formal financial statement, but rather a self-check to determine that debits equal credits. At right is the trial balance prepared from the general ledger of Xao Corporation.
FINANCIAL STATEMENTS FROM THE TRIAL BALANCE: In the next chapter you will learn about additional adjustments that may be needed to prepare a truly correct and up-to-date set of financial statements. But, for now, you can probably see that a tentative set of financial statements could be prepared based on the trial balance. The basic process is to transfer amounts from the general ledger to the trial balance, then into the financial statements:
In reviewing the following financial statements for Xao, notice that blue italics were used to draw attention to the items taken directly from the trial balance above. The other line items and amounts simply relate to totals and derived amounts within the statements. These statements would appear as follows:
T-ACCOUNTS

No. 101 Cash
No. 102 Accounts Receivable
No. 103 Land
No. 201 Accounts Payable
No. 202 Notes Payable
No. 301 Capital Stock
No. 401 Service Revenue
No. 501 Advertising Expense
No. 502 Utilities Expense
The assignment of a numerical account number to each account assists in data management, in much the same way as zip codes help move mail more efficiently. Many computerized systems allow rapid entry of accounts by reference number rather than by entering a full account description.
CONTROL AND SUBSIDIARY ACCOUNTS: Some general ledger accounts are made of many sub-components. For instance, a company may have total accounts receivable of $19,000, consisting of amounts due from Compton, Fisher, and Moore. The accounting system must be sufficient to reveal the total receivables, as well as amounts due from each customer. Therefore, sub-accounts are used. For instance, in addition to the regular general ledger account, separate auxiliary receivable accounts would be maintained for each customer, as shown in the following illustration:
The company's chart of accounts will likely be based upon some convention such that each subsidiary account is a sequence number within the broader chart of accounts. For instance, if Accounts Receivable bears the account number 102, you would expect to find that individual customers might be numbered as 102.001, 102.002, 102.003, etc. It is simply imperative that a company be able to reconcile subsidiary accounts to the broader control account that is found in the general ledger. Here, computers can be particularly helpful in maintaining the detailed and aggregated data in perfect harmony.
Source: Principles of accounting
Note that for each date in the above example, the sum of entries under the "Assets" heading is equal to the sum of entries under the "Liabilities + Owner's Equity" heading. In most of these cases, the transaction affected both sides of the accounting equation. However, note that the Sep 25 transaction affected only the asset side with an increase in cash and an equal but opposite decrease in accounts receivable.
The bike parts are considered to be inventory, which appears as an asset on the balance sheet. The owner's equity is modified according to the difference between revenues and expenses. In this case, the difference is a loss of $175, so the owner's equity has decreased from $7500 at the beginning of the month to $7325 at the end of the month.