> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lerian.studio/llms.txt
> Use this file to discover all available pages before exploring further.

# What is accounting?

> The core idea behind accounting: a trustworthy record of money in, money out, and what a business owns versus what it owes.

**Accounting** is the practice of keeping a clear, honest record of a business's money. It covers everything of value the business owns or owes, not just the cash on hand. Think of it as a diary that answers three questions at any moment: what came in, what went out, and where do we stand right now.

A business wants to know what it owns, what it owes, and whether the two add up. Accounting is how it keeps that picture accurate, day after day.

## The three things every business tracks

***

Accounting watches three flows:

* **Money coming in**: sales, payments from customers, loans received, money the owners put in.
* **Money going out**: rent, salaries, supplies, loan repayments.
* **What's owned vs. what's owed**: the cash, equipment, and money others owe you, balanced against the debts you still have to pay.

A good record keeps these connected. If money moved, write it down. If something is owned or owed, account for it. Controls and reconciliation help identify missing or inconsistent records.

## Why it has to be trustworthy

***

Imagine running a shop where you *think* you have money but aren't sure. You can't pay suppliers with a guess, prove to a bank that you're worth lending to, or tell if you're making a profit.

Accounting uses records and controls to make financial information checkable. A balanced entry is an arithmetic check: it confirms the recorded sides match, but does not by itself prove authorization, classification, or completeness.

| Without good accounting            | With good accounting                                   |
| ---------------------------------- | ------------------------------------------------------ |
| You guess how much you have        | Your records show how much you have and why            |
| Money can quietly go missing       | Controls and reconciliation help catch missing records |
| You can't prove anything to others | Auditors and banks can verify it                       |
| Profit is a mystery                | Profit is a number you can see                         |

<Note>
  **See also in Core Banking**

  Banking platforms exist to keep the same trustworthy-record promise. See [Core banking fundamentals](/en/start-here/fundamentals/core-banking/what-is-core-banking).
</Note>

## Next steps

***

<Note>
  **Next up**

  See why accounting matters the moment software starts holding money in [Why accounting matters](/en/start-here/fundamentals/accounting/why-accounting-matters).
</Note>