FlyBudget

A free, open-source budgeting app. Plan every dollar, track every account, and keep your financial data on your own computer or server.
No subscription. No account. No tracking.

Website · Discord · Tour · User guide · Security · Roadmap · Contributing

1. Try it without installing anything. The live demo runs the real app in your browser with a sample budget. Nothing leaves your browser, and closing the tab wipes it.

2. Install the desktop app.

The installers aren't signed with a paid Windows or Apple certificate yet, so your computer may ask you to confirm the first time you open FlyBudget. The installing guide shows what to click, and every download can be verified against the build that made it.

3. Follow the checklist. A new budget opens on a short setup, and the dashboard's Getting started checklist walks you through adding accounts, importing transactions and planning your first month. The user guide covers every feature.

Run FlyBudget on your own server, protected by a password, and open it from any browser, including your phone:

curl -O https://raw.githubusercontent.com/dtymoszenko/FlyBudget/main/docker-compose.yml
openssl rand -base64 32 > flybudget_data_key.txt   # encryption key for bank credentials
sudo chown 1000:1000 flybudget_data_key.txt && sudo chmod 400 flybudget_data_key.txt
docker compose up -d
docker logs flybudget                              # prints the one-time setup code

Open http://<your-server>:3001, enter the setup code and choose your password. Images are published for amd64 and arm64 as ghcr.io/dtymoszenko/flybudget. The self-hosting guide covers HTTPS, backups and updates.

Give every dollar a job Planned, actual and remaining for every category. Bars turn amber near the plan and red when you go over, and whatever you don't plan carries into next month.	Sort transactions once Write a rule in plain words and see which past transactions it matches as you type. Rules rename, categorize and split everything that comes in after.
Reports you arrange yourself Dashboards of net worth, spending, trends and a transaction calendar, plus a custom report builder for anything else.	See where it all flows Income sources on one side, spending on the other, and what's left over in between.
Never miss a bill Bills, subscriptions and paychecks for the month, as a list or a calendar. FlyBudget can even find them in your past transactions.	Every account in one place Checking, credit cards, loans, investments, property and more, with your net worth across all of them and reconciliation when you need it.

Every page has a layout for small screens, and transactions you add without a connection are saved as soon as it's back.

Take the full tour →

• Budgeting: zero-based planning by category, carry-over between months, and each category's history
• Accounts: 17 account types across cash, credit, investments, property and loans, with net worth, reconciliation and value updates
• Multiple currencies: accounts in their own currency, counted in your budget's at each day's exchange rate (typed in, or ECB rates when you turn them on)
• Transactions: splits, transfers, search and filters, CSV import with duplicate detection, and bank sync through SimpleFIN or Plaid
• Rules: conditions on payee, amount, date, account and more; actions that rename, categorize, add notes or split; run them on past transactions with a preview
• Recurring: bills and paychecks by month or calendar, automatic detection, and transactions created for you
• Reports: dashboards with movable widgets, a custom report builder, cash flow and a transaction calendar
• Goals for savings targets, payees with logos and default categories, and backups you can restore in one step
• Light and dark themes, and a phone layout for every page

A budgeting app holds some of the most personal data you have, so FlyBudget treats security as a feature, not an afterthought:

• ✅ Local-first. No FlyBudget servers, accounts, telemetry or crash reports. Your data only leaves your machine when bank sync talks to Plaid or SimpleFIN for you.

• ✅ Encrypted bank credentials. Plaid and SimpleFIN secrets are stored with AES-256-GCM, under a key protected by your operating system (Windows DPAPI, macOS Keychain, Linux secret service). A copied database gives no bank access.

• ✅ A locked-down app. The built-in API answers only the app's own window, with a new secret every launch; other websites and programs are turned away. The window is sandboxed under a strict Content Security Policy.

• ✅ A hardened server. Self-hosted installs use a scrypt-hashed password, a one-time setup code, rate-limited sign-in, signed-in device management and a read-only, unprivileged container.

• ✅ Verifiable releases. Every download and Docker image comes with signed build provenance from GitHub Actions. Check that a file was built from this repository:

  gh attestation verify FlyBudget-Windows-Setup.exe -R dtymoszenko/FlyBudget

• ✅ A careful supply chain. Dependency install scripts never run, npm registry signatures are checked in CI, and new dependency versions wait a week before they're proposed.

Read the full model in SECURITY.md or on the security page. Found a problem? Please report it privately.

• Tested on every change: property-based tests check the budget math, rules engine and recurrence dates against hundreds of generated cases, and Playwright end-to-end tests drive the desktop app, the self-hosted server, a phone-sized screen and the demo.
• Never locks you out: if the server drops, FlyBudget keeps showing your budget, queues new transactions and reconnects on its own.
• Your data is portable: download a full backup or CSV export whenever you like.
• Documented: a user guide for every feature, a tour of every page and an FAQ.

git clone https://github.com/dtymoszenko/FlyBudget.git
cd FlyBudget
npm ci && npm ci --prefix client && npm ci --prefix server
npm run dev          # opens on http://localhost:5173
npm run electron:dev # or run it as the desktop app

Ideas we're considering (not promises):

• Imports from YNAB and other budgeting apps
• Investment projections and forecasting, and a FIRE calculator
• Envelope budgeting
• Syncing one budget between devices that also work offline
• MCP support

Have an idea? Open an issue.

Contributions are welcome, from bug reports to pull requests. See CONTRIBUTING.md for setup, the checks to run and commit conventions. Before your first pull request is merged, you'll be asked to accept the Contributor License Agreement with a one-line comment.

FlyBudget is free software under the GNU Affero General Public License v3.0 (AGPL-3.0-only). You can use, study, share and modify it. Using it yourself, changed or not, asks nothing of you. If you give copies to others, their source code must be available to them under the same license. If you let other people use a modified version over a network, it must offer those users your version's source code, free of charge (the "Source code" link in Settings does this once it points at your code). You don't have to publish it to everyone, only offer it to the people who use it.

If FlyBudget helps you, a ⭐ helps other people find it.