# Free Open-Source Payment Platform That Handles Global Taxes For You

**URL:** <https://onehack.st/t/free-open-source-payment-platform-that-handles-global-taxes-for-you/314592>\
**Category:** Tools & Scripts\
**Tags:** tools, programming, hacking\
**Created:** [December 10, 2025, 2:38pm UTC](https://onehack.st/t/free-open-source-payment-platform-that-handles-global-taxes-for-you/314592 "2025-12-10T14:38:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Aina](https://onehack.st/user_avatar/onehack.st/aina/32/167469_2.png) [@Aina](https://onehack.st/u/Aina)\
**Post date:** [December 10, 2025, 2:38pm UTC](https://onehack.st/t/free-open-source-payment-platform-that-handles-global-taxes-for-you/314592/1 "2025-12-10T14:38:46Z")

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**Polar: Sell SaaS, Downloads & License Keys Without Writing Billing Logic** 💸

> 🗺 **One-Line Flow:**  
> Some absolute legends spent $2M and 3 years building a “sell anything digital” engine with taxes, subscriptions, and auto-delivery — then dumped it on GitHub for free. Go grab it.

 ![image](https://onehack.st/uploads/default/original/3X/6/4/641eed4b16f83db957b305bf9192004833f095d1.jpeg)

* * *

## ⚡ What the hell is Polar?

Polar turns your side project into a money machine.

You plug it in. It handles payments, receipts, subscriptions, taxes worldwide, and all the finance bullshit you hate. You keep building cool stuff.

- 🌐 Website: [polar.sh](https://polar.sh/)
- 🐙 GitHub: [github.com/polarsource/polar](https://github.com/polarsource/polar)
- 📚 Docs: [docs.polar.sh](https://docs.polar.sh/)
- 💬 Discord: [discord.gg/Pnhfz3UThd](https://discord.gg/Pnhfz3UThd)

* * *

## 🏦 Why This Isn’t “Just Another Stripe Wrapper”

**Polar is a Merchant of Record.**

When someone in Germany buys your thing, Polar is legally the seller. They collect the VAT. They file the paperwork. They deal with the EU bureaucracy nightmare.

You just get paid.

They have EU VAT registration, US state registrations, and use global accounting firms. The $1,700/year cost per market? **They pay it, not you.**

This alone saves you from the “oh fuck I owe taxes to 47 countries” moment.

Details: [docs.polar.sh/merchant-of-record/introduction](https://docs.polar.sh/merchant-of-record/introduction)

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## 🧩 What Can You Sell?

- SaaS subscriptions
- One-time digital products
- File downloads (up to **10GB per file** )
- License keys (auto-generated and validated)
- Private GitHub repo access (auto-invites collaborators)
- Discord server roles (auto-assigned)
- Bundles and packages

If it lives on the internet and people would pay for it — Polar handles it.

* * *

## 💰 Pricing (No Bullshit)

- **4% + $0.40** per transaction
- **$0** monthly fee

Sell something for $20 → Polar takes ~$1.20 → You keep the rest without writing billing code.

**Hidden costs:** Chargebacks = $15 each. Payouts = $2/month + small percentage. Still cheaper than everyone else.

Full breakdown: [polar.sh/resources/pricing](https://polar.sh/resources/pricing)

* * *

## 🆚 Competition Smackdown

| Platform | Fee | Handles Taxes? |
| --- | --- | --- |
| **Polar** | 4% + $0.40 | ✅ Globally |
| **Stripe** | 2.9% + $0.30 + headaches | ❌ You’re alone |
| **Lemon Squeezy** | 5% + $0.50 | ✅ Yes |
| **Gumroad** | 10% + 2.9% | ✅ Yes |

**On $25K in sales:** Stripe ~$725, Polar ~$1,000, Lemon Squeezy ~$1,250, Gumroad ~$3,225.

Polar is **20% cheaper** than other MoR platforms.

⚠ **Lemon Squeezy warning:** Since Stripe bought them (July 2024), users report checkout errors and ghost support. Migration tools exist for a reason.

* * *

## 🎁 The Hidden Good Shit

**Auto-Delivery System:** When someone pays, Polar automatically:

- Generates and validates license keys
- Sends file downloads
- Invites them to Discord with specific roles
- Adds them as GitHub collaborators
- Triggers webhooks to your systems

No 3am “oh shit I forgot to send the download link” moments.

**Checkout options:** Embedded overlay, custom fields, discount codes, pre-filled customer data, API session creation.

* * *

## 📤 Payouts

**Minimums:** $20 USD / €20 EUR / £20 GBP

Works in **100+ countries** including India, Indonesia, Nigeria, Pakistan, Philippines, Bangladesh, Kenya, Vietnam — places Stripe normally won’t touch directly.

Timing: 4-7 business days. You control when to withdraw.

Details: [docs.polar.sh/features/finance/payouts](https://polar.sh/docs/features/finance/payouts)

* * *

## 🚫 What You CAN’T Sell

**Hard no:** Physical goods, consulting/services, adult content, donations, marketplaces, gambling, crypto/NFTs, IPTV, medical advice, “get rich” schemes.

**Needs approval:** Directories, pre-orders, ebooks, ticket sales.

**No PayPal support** — notable gap vs Lemon Squeezy.

Full policy: [docs.polar.sh/merchant-of-record/acceptable-use](https://docs.polar.sh/merchant-of-record/acceptable-use)

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## 📦 SDKs & Integrations

**Official SDKs:**

- JavaScript: [github.com/polarsource/polar-js](https://github.com/polarsource/polar-js)
- Python: [github.com/polarsource/polar-python](https://github.com/polarsource/polar-python)
- Go, PHP: In the polarsource GitHub org

**Framework adapters:** [github.com/polarsource/polar-adapters](https://github.com/polarsource/polar-adapters) — Next.js, Remix, SvelteKit, Astro, Nuxt, Express, Fastify, Hono, Supabase, Deno.

You don’t hand-roll webhooks unless pain is your kink.

* * *

## 🐙 GitHub Integration

GitHub officially added Polar as a funding platform (March 2024).

Add to your `FUNDING.yml`:

```yaml
polar: your-username

```

**GitHub Sponsors:** 0% fee, but you handle all taxes yourself.  
**Polar:** 4% fee, but taxes handled globally + auto-delivers benefits.

* * *

## 🔄 Migration

**From Lemon Squeezy:**

```bash
npx polar-migrate@latest

```

Moves products, license keys, files, discount codes, customers. Active subscriptions need customers to re-subscribe.

Docs: [docs.polar.sh/migrate](https://docs.polar.sh/migrate)

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## 🖥 Self-Hosting (Reality Check)

Yes, it’s Apache 2.0. Yes, you _can_ self-host.

**But:** Self-hosting = no Merchant of Record benefits. That’s the whole point.

Needs: PostgreSQL, Redis, S3/Minio, Node.js 22, Python 3, Stripe account, GitHub App. No production docs — only dev setup.

Guide: [github.com/polarsource/polar/blob/main/DEVELOPMENT.md](https://github.com/polarsource/polar/blob/main/DEVELOPMENT.md)

* * *

## 🏆 Who’s Using This?

- **SerenityOS / Ladybird Browser** — Open source issue funding
- **Litestar** — Python framework at [polar.sh/litestar-org](https://polar.sh/litestar-org)
- **Nuxt** founders are angel investors

**Stats:** 17,000+ signups, 120%+ MoM revenue growth, $10M seed from Accel, angels include Vercel/Supabase/HashiCorp founders.

* * *

## 🆓 Open-Source Alternatives

**Lago** — [github.com/getlago/lago](https://github.com/getlago/lago)  
Usage-based billing. 8,800+ stars. Best for AI/API companies. `docker compose up` and done.

**Kill Bill** — [github.com/killbill/killbill](https://github.com/killbill/killbill)  
Enterprise beast since 2010. 50+ plugins. Needs Java knowledge.

**Hyperswitch** — [github.com/juspay/hyperswitch](https://github.com/juspay/hyperswitch)  
39,000+ stars. Payment routing across 50+ processors. Rust-based.

**BTCPay Server** — [github.com/btcpayserver/btcpayserver](https://github.com/btcpayserver/btcpayserver)  
Bitcoin/Lightning with **zero platform fees**. Crypto-native’s dream.

**Invoice Ninja** — [github.com/invoiceninja/invoiceninja](https://github.com/invoiceninja/invoiceninja)  
Freelancer invoicing with mobile apps.

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## 📋 Quick Links

| What | Where |
| --- | --- |
| Website | [polar.sh](https://polar.sh/) |
| GitHub | [github.com/polarsource/polar](https://github.com/polarsource/polar) |
| Docs | [docs.polar.sh](https://docs.polar.sh/) |
| Pricing | [polar.sh/resources/pricing](https://polar.sh/resources/pricing) |
| Tax/MoR | [docs.polar.sh/merchant-of-record/tax](https://docs.polar.sh/merchant-of-record/tax) |
| Webhooks | [docs.polar.sh/integrate/webhooks/events](https://docs.polar.sh/integrate/webhooks/events) |
| Discord | [discord.gg/Pnhfz3UThd](https://discord.gg/Pnhfz3UThd) |
| Sandbox | [sandbox.polar.sh](https://sandbox.polar.sh) |

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## 🧠 Bottom Line

**Use Polar if:** You’re selling digital stuff and don’t want to become a tax accountant in 47 countries.

**Skip Polar if:** You need PayPal, sell physical goods, or do consulting.

**The honest take:** Three-person team, $10M funded, real users, real growth. The Merchant of Record thing is genuinely valuable — most people underestimate how badly international taxes can fuck you.

Worst case: You learn how a proper payments engine works.  
Best case: This is the backbone of the thing that finally pays your bills.

---

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**Author:** ![slimjval](https://onehack.st/user_avatar/onehack.st/slimjval/32/30254_2.png) [@slimjval](https://onehack.st/u/slimjval)\
**Post date:** [December 14, 2025, 12:36pm UTC](https://onehack.st/t/free-open-source-payment-platform-that-handles-global-taxes-for-you/314592/2 "2025-12-14T12:36:05Z")

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thanks for sharing