Dictionary / Internal Control
What does Internal Control mean in accounting?
Quick definition
Controls & auditThe general methodology by which management is carried on within an organization; also, any of the numerous devices for supervising and directing an operation or operations generally. This term guides how bookkeepers record, classify, and explain related transactions in routine financial reporting.
Read more below
Examples
Two people on the lumber check
You run a hardware store and on March 19 a $2,800 invoice from a lumber supplier arrives for deck boards the yard already received. Your counter manager can enter the bill in QuickBooks Online and print the check, but you have to sign it after you match the invoice to the receiving slip. That two-person check is the internal control: a device that supervises the payables operation so one person cannot both create and cash a payment. You approve it, accounts payable and checking both drop $2,800, and the signed check goes in the mail. If the manager could sign too, a swapped vendor name would not get a second look.
Owner does it all, cash goes missing
You own a salon and you open the register, bag the deposit, and match the card batch yourself; through July nobody else counts the drawer or reviews the bank feed. On August 3 the credit union deposit is $340 short of the till tape. There was no internal control: no split of custody and no weekly review. You can post $340 to cash short so the bank rec ties, but that entry does not replace a supervision device. Have your Saturday stylist count the drawer, or send the weekly deposit total to your tax person, so the next short is not yours alone to find.
Why it matters
Internal control is how you supervise operations: who can approve a bill, who signs a check, who opens customer payments (or uses a lockbox), and who reviews cash on hand. You use these devices every week if anyone besides you handles cash, cards, or vendor payments; they are not a ledger account, and they are not accounting control, which is the bookkeeping procedure that keeps each entry supported. Skip the second look, and a bad payment or missing cash can sit in the books for months looking like a normal expense. Watch for any cash, bill, or refund that one person can start and finish alone.
Further reading
Compare this term with reference material from other accounting and finance websites.
Keep learning
Start with the bookkeeping basics, then compare software when you are ready to pick a tool.
Getting startedBookkeeping basics for small-business ownersWhat bookkeeping is, the records you need, double-entry in plain English, and a monthly rhythm that fits a 1–50 person shop.Updated October 4, 2026
RolesWhat does a bookkeeper do?A bookkeeper records bills, invoices, and bank activity so your books stay current. See the weekly work, the month-end close, and what they do not do.Updated August 18, 2026
Monthly closeMonthly bookkeeping: what to close each monthMonth-end is the job: reconcile banks and cards, age bills and invoices, check payroll, then read the reports. A close checklist for small-business owners.Updated August 18, 2026
Expense ManagementThe 10 Best Expense Management Software for Small BusinessWe ranked the 10 best expense management tools for small business, scored on features, ease of use, and value, with honest tradeoffs for each.Updated August 8, 2026Frequently asked questions
What is Internal Control in bookkeeping?
The general methodology by which management is carried on within an organization; also, any of the numerous devices for supervising and directing an operation or operations generally.
When should I use Internal Control?
Use Internal Control 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 Internal Control?
Internal Control is used for internal control entries, while Imprest Cash Fund 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.