Symfony 7.4 LTS is the right foundation for a SaaS in 2026 — here's the support math

Choosing a framework version for a SaaS is not a technical decision, it's a maintenance budget decision. You're picking how often you'll be forced to do upgrade work that customers never see. Here is the support math for Symfony in mid-2026, and why ShipAnvil sits on 7.4 LTS.

The dates that matter

From symfony.com/releases, as of June 2026:

• Symfony 7.4 (LTS) — released November 2025. Bug fixes until November 2028, security fixes until November 2029.
• Symfony 6.4 (LTS) — the previous LTS. Bug fixes end November 2026 (five months from now), security fixes end November 2027.
• The next LTS will be Symfony 8.4, expected November 2027.

Non-LTS releases (7.3, 8.0 when it lands…) get eight months of bug fixes. They're great for agencies shipping projects that get continuous attention; they're a treadmill for a product company.

What this means for a SaaS you're starting now

Starting on 6.4 in 2026 is starting in debt. You'd have twelve months of security coverage left and an unavoidable 7.x migration on the calendar — before you've written a feature.

Starting on 7.4 buys you three quiet years. Security coverage to November 2029, and your first mandatory migration target (8.4 LTS) won't even exist until late 2027 — by which point it's a deliberate, well-trodden upgrade rather than an emergency. For a small team trying to reach revenue, "no forced framework work until the business can pay for it" is exactly the guarantee you want.

There's a second-order benefit: PHP version alignment. Symfony 7.4 runs happily on PHP 8.4 (and 8.5), so you get modern engine performance (property hooks, the new JIT improvements) without sitting on a framework that will EOL under you.

"But 8.0 is newer"

Symfony's versioning makes this a non-question: 7.4 and 8.0 ship the same features — 8.0 is 7.4 minus the deprecated code paths. The upgrade path Symfony designed is: sit on 7.4, fix deprecations at your own pace (the profiler counts them for you), then the 8.x jump is mechanical. Starting a product directly on a .0 release buys you nothing except a shorter support window.

The checklist we apply (and ship)

ShipAnvil's stance, which you can steal even if you never buy it:

1. Pin the LTS in composer.json ("symfony/framework-bundle": "7.4.*") — minor versions of dependencies move, the framework doesn't surprise you.
2. Run the suite with deprecations visible. PHPUnit surfaces them; fixing a handful per month beats fixing three years' worth before a migration. (This is also why we keep PHPStan at level max — the 8.x upgrade will mostly be "the tools already told us".)
3. Track the EOL dates somewhere you'll see them. November 2028 sounds far away; so did every EOL date ever.
4. Don't fork the framework's conventions. Every "clever" deviation from standard Symfony is a tax you pay at every upgrade. Boring structure is what makes the 2029 you grateful.

If you want the foundation pre-built on exactly this reasoning — 7.4 LTS, PHP 8.4+, deprecation-clean, 324 tests — that's what ShipAnvil is. Either way: check the dates yourself before committing, they're the cheapest due diligence you'll ever do.