> ## 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.

# Fundamentals: Accounting series

> The Fundamentals tab adds an Accounting series covering accounting principles end to end, with cross-links to Core Banking and a bridge to Midaz.

<Badge stroke icon="calendar-days" iconType="regular">June 19, 2026</Badge> <Badge stroke icon="file-code" iconType="regular">Documentation update</Badge> <Badge color="green" size="lg" stroke icon="circle-check" iconType="regular">No migration required</Badge>

## Affects

***

Anyone who wants to understand the accounting principles behind a ledger — including engineers, finance and product teams, and implementation partners working with Midaz. This is new conceptual content and does not change any runtime API behavior, endpoints, or payloads.

## What changed

***

### 1. New Accounting series in Fundamentals

A new **Accounting** series has been added inside the **Fundamentals** tab, covering accounting from the ground up and ending with a bridge into Lerian's products:

* **What is accounting / Why accounting matters** — the purpose of accounting and why it matters for a ledger.
* **Assets, liabilities & equity** — the accounting equation and what each side represents.
* **Debits and credits** — how entries are recorded.
* **Double-entry bookkeeping** — keeping the books balanced.
* **Chart of accounts** — organizing accounts into a coherent structure.
* **Financial statements** — balance sheet, income statement, and how they relate.
* **Journal entries** — recording transactions.
* **Revenue and expenses** — recognizing income and costs.
* **Accrual vs. cash accounting** — the two timing models and when each applies.
* **The accounting cycle** — the end-to-end flow from transaction to statement.
* **Accounting in Lerian** — a bridge that connects these principles to Midaz.

### 2. Cross-links, diagrams, and cleanup

The Accounting and Core Banking series are now **cross-linked** so readers can move between principles and ledger mechanics. **Mermaid diagrams** were added to illustrate key flows, and **duplicated content** across the Fundamentals material was removed for a cleaner reading path.

## Impact

***

This is a **documentation-only** update. There is no change to product behavior, API contracts, or configuration. No migration is required. The series is conceptual and complements the Core Banking series, with the **Accounting in Lerian** page connecting the theory to Midaz.

## What you need to do

***

<Steps>
  <Step>
    Read the **Accounting** series in the Fundamentals tab to build accounting fundamentals from first principles.
  </Step>

  <Step>
    Use the cross-links to move between the **Accounting** and **Core Banking** series as needed.
  </Step>

  <Step>
    Finish with **Accounting in Lerian** to connect the concepts to Midaz.
  </Step>
</Steps>

### Deadline

None. No action is required to keep your integration working.

### Why

To give readers a complete, self-contained path through accounting principles before they apply them in Midaz, and to keep the Fundamentals material consistent and free of duplication.

## Resources

***

* [What is accounting?](/en/fundamentals/accounting/what-is-accounting)
* [Accounting in Lerian](/en/fundamentals/accounting/accounting-in-lerian)
* [What is core banking?](/en/fundamentals/core-banking/what-is-core-banking)