Every transaction must debit one account and credit others by an equal amount. This ensures the books balance: the difference between income and expenses exactly equals the sum of assets and liabilities.

The GnuCash checkbook-style register provides a custom, convenient and familiar interface to entering financial transactions.

The register supports common checking and credit-card transactions, as well as income, stock and currency transactions. The following features are also provided:

• The ability to enter split transactions
• The ability to mark a transaction as cleared or reconciled
• Autofill of entered transactions
• The ability to display multiple accounts in a single register window
• A summary bar that displays all of the relevant account's balance information
• Many options to customize the appearance and the display style

You can create recurring transactions with a high level of customization of amounts and timeline. You can also set an automatic reminder when a transaction is due.

An assistant that runs when GnuCash is started allows scheduled transactions to be postponed without canceling or entering them before the due date.

GnuCash has an integrated module to display graphs of your financial data in the form of:

• Barcharts
• Piecharts
• Scatter plots

GnuCash also comes complete with a full suite of standard and customizeable reports, such as:

• Balance Sheet
• Profit & Loss
• Portfolio Valuation
• and many others.

Graphs and reports can be highly and easily customized in appearance and contents, in order to fullfill every user's need.

Account reconciliation allows the user to compare the transactions entered in an account against a bank statement. This operation is very useful to spot untracked transactions or data entry errors and ensure that your books match the bank's.

The GnuCash reconcile tool with running reconciled and cleared balances makes reconciling against bank statements an easy task.

收入、支出科目类别(也就是分类)允许您对您的现金流进行分类管理。当恰当的使用复式记账功能和所有者权益科目时，这将允许您生成报表，比如损益表，这是普通的系统无法处理的。

Simplify managing a small business with Customer and Vendor tracking, Jobs, Invoicing and Bill Payment, and Tax and Billing Terms.

Using A/Receivable and A/Payable accounts you can even manage payrolls for your employees.

GnuCash gives you also a tool to manage your business' budget so that you can easily plan your financial strategy.

不同的科目可以使用不同的货币。当复式记账启用之后，资金在不同货币的科目见流动会完全的保持平衡。

跟踪一支股票 (每个科目一个)，或在一个组合科目中 (一组科目可以同时显示)。

从各种网站取得股票和基金的报价，自动更新组合投资的信息。并且，会定期的添加额外的价格来源。

GnuCash by default stores data in an xml format. Starting with version 2.4, GnuCash financial data can be stored in a SQL database using SQLite3, MySQL or PostgreSQL.

Note this feature is considered experimental. It works for most of the common use cases but some corner cases have been reported to result in data loss. The GnuCash developers fix each issue as it gets reported. There is however no full test coverage so there may still be scenarios left that result in data loss.

If you are migrating from other financial software, GnuCash can import Intuit^® Quicken^® QIF files using a practical assistant.

GnuCash is also the first free software application to support the OFX (Open Financial Exchange) protocol that many banks and financial services are starting to use.

A transaction matching system ensures that duplicate transactions are accurately recognized and automatically deleted during file import.

GnuCash is the first free software application to support the German Home Banking Computer Information protocol, allowing German users to perform statement download and initiate bank transfers and direct debits.

GnuCash runs on many different operating systems including Windows, MacOSX and Linux.

GnuCash handles internationalized dates and currencies. The application's menus and popups have been translated to 50 languages, including Chinese, Danish, French, German, Hungarian, Italian, Japanese, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish, Turkish, Ukrainian, and British English. Documentation is available in English, French, Portuguese and Spanish.

强大的交易查询对话框可以帮助您定位，大海捞针不再困难。

支票可以用标准格式打印在通用的支票上。可定制图形界面允许要打印的定制的支票布局。

有一个向导式的对话框，用以建立以计划的交易的形式存在的贷款还款。

GnuCash is very well documented: along with the application Manual, new users can take full advantage of the Tutorial and Concepts guide. This document gives background information on accounting principles and how they are reflected in GnuCash with many practical examples described step by step.