Andréa Sumé

Source Documents Definition, Types, Importance, and Pros

what is a source document

The accounting books’ core papers—purchase orders, invoice source documents, and receipts—contain all pertinent information about each transaction. A credit note issued capital lease by a seller to a buyer is a source document used in the case of a sales return journal. Companies give this receipt to customers who have returned any goods they bought.

After almost a decade of experience in public accounting, he created MyAccountingCourse.com to help people learn accounting & finance, pass the CPA exam, and start their career. Before you start, I would recommend to time yourself to make sure that you not only get the questions right but are completing them at the right speed. They are the only real evidence of a transaction taking place, on a specific day and at a specific amount. Be sure to check your understanding of this lesson by taking the quiz in the Test Yourself!

Credit and Debit Notes

A source document captures the key information about a transaction, such as the names of the parties involved, amounts paid (if any), the date, and the substance of the transaction. Source documents are frequently identified with a unique number, so that they can be differentiated in the accounting system. The pre-numbering of documents is particularly useful, since it allows a company to investigate whether any documents are missing.

Various regulations mandate that some source documents be retained for a number of years. It may also be prudent to retain these documents irrespective of regulations, if only to provide evidence in the event of a lawsuit, or to provide better customer service. For these reasons, a company should adopt a document destruction policy that strictly controls the shredding or other form of elimination of source documents until a certain number of years have passed. It’s advised to keep your source documents for five to seven years for tax purposes, though rules will differ. According to the IRS, small businesses must preserve any documentation that substantiates deductions, income, and credits until the statute of limitations for that particular tax return has run out. They may be the only record of certain transactions, such as payments made directly into the bank account of a supplier by a customer through the banking system (a BACS transfer).

The key source document relating to credit sales made by the business is the invoice. Most accountants, bookkeeping service providers, and lawyers recommend keeping these documents for 5 to 7 years. Whereas, per IRS, small organizations must preserve all documents substantiating income, credits, and deductions until that specific year’s statute of limitations runs out. As you can see, all of the source documents are the purpose and content of an independent auditors report used to ensure that only proper goods are ordered, received, and paid for. The Internal Revenue Service mandates retention intervals for some types of documents related to payroll. If there is any question regarding the retention period for a document, consult with a knowledgeable attorney.

It is essentially a summary of the financial relationship between two businesses, including any amounts owing. Businesses normally send an invoice together with goods (or once services have been delivered) so as to indicate the amount of payment required to be paid to them. Bookkeepers and other accounts personnel are adamant that a business keeps records of everything. As mentioned in the previous lesson, the source document is the first document that exists relating to a transaction.

Deposit Slip

what is a source document

A supplier invoice also supports the recordation of an expense, inventory item, or fixed asset in the buying entity’s accounting system. Another common type of statement and source document is the bank statement, which shows the monthly transactions in your bank account. Welcome to the lesson on source documents in accounting, where we’ll learn what these are, why they’re important and where we’ll look at some common examples. A source document is an original record which contains the detail that supports or substantiates a transaction that will be (or has been) entered in an accounting system. Lockbox check images support the recordation of cash receipts from customers.

Why are bank statements important for the preparation of accounting records?

In other cases, they will summarize the information available elsewhere. For most retail businesses, however, the source document that accountants will work from is the till roll. This shows the total amount taken in for goods and services, whether by cash, check, or card. On a practical level, the original invoices and credit notes are of course sent to the customer.

Is a Cash Book a Source Document?

A dispatch note is a document that accompanies the shipment of the goods, detailing what was sent and confirming that it matches the purchase order. Fifth and finally (and possibly after Acme has had to issue a statement of the account, see above), Maiden sends Acme a check for the amount owed. This is often done using a payment slip that can be torn off the invoice. If there are any problems with the shipment, debit and credit notes may be issued. Fourth, Maiden checks the invoice against the purchase order and possibly the dispatch note. The aim is to ensure that the goods were genuinely ordered and have been received.

  1. The pre-numbering of documents is particularly useful, since it allows a company to investigate whether any documents are missing.
  2. When a consumer pays with a check or cash, the seller creates a bank deposit slip, which is presented to the bank along with the check and cash.
  3. Source documents are original records that include the information supporting or substantiating business transactions recorded in the accounting system.
  4. You may be working from a copy, or in some cases simply from a computer listing transactions within the accounting system.
  5. Additionally, auditors check the annual financial statements of a business to ensure their accuracy.

Source documents are typically retained for use as evidence when auditors later review a company’s financial statements, and need to verify that transactions have, in fact, occurred. They usually contain a description of a business transaction, the date of the transaction, a specific amount of money, and an authorizing signature. Many source documents are also stamped to indicate an approval, or on which to write down the current date or the accounts to be used to record the underlying transaction. Additionally, auditors check the annual financial statements of a business to ensure their accuracy. Part of their audit involves reviewing the details of various transactions, which are originally shown in the source documents.

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This invoice is a source document acting as tangible proof that a transaction occurred between the two companies. Source documents are critical to auditors, who use them as evidence that recorded transactions actually occurred. Attorneys may also need access to source documents, in order to bolster their positions on various issues involving litigation. A source document is also used by companies as proof when dealing with their business partners, usually in regard to a payments. Source documents are essential proof that business events have occurred. Otherwise, a business would not be able to prove to its auditors that the transactions from which its financial statements were compiled ever occurred.

The person who is an authorised signatory of the bank account from which the check is issued must sign the check. Each check has a unique number that needs to be entered into the accounting software. However, larger businesses need more formal systems to ensure that purchases are authorized by the right person and that payments for goods are only made when they have been received and checked. Whether or not the customer issues a debit note, the response of the business (if it believes the complaint is justified) is to issue a credit note.

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