Quick answer: Copy your Substack URL (yourname.substack.com), then paste it into your Instagram or TikTok bio's link field. If your bio link already promotes something else, add your Substack as one option on a link-in-bio page instead of swapping your only link back and forth every time you publish.
Key Takeaways
- Paste your
substack.comURL directly into Instagram's or TikTok's bio link field.- Substack passed 8.4 million paid subscriptions in Q1 2026, up 68% from a year earlier (Backlinko, 2026), so subscribe-from-bio traffic is a real channel now.
- If you promote more than your newsletter, a link-in-bio page keeps Substack as one tile instead of your only link.
How Do You Add Substack to Your Bio Link?
The direct route takes seconds:
- Go to your Substack and copy the URL (it looks like
https://yourname.substack.com). - On Instagram, tap Edit profile → Links → Add external link, and paste it.
- On TikTok, tap Edit profile, tap the bio link field, and paste the same URL.
That's enough if growing subscribers is the only thing your bio needs to do. The subscribe button on your Substack homepage does the rest.
Why a Direct Substack Link Isn't Always Enough
Substack's growth explains why creators are fighting for that bio slot in the first place: the platform now has 50 million active subscriptions, with paid subscriptions up from 5 million in March 2025 to 8.4 million by Q1 2026, and nearly 100,000 publications now earn money on it (Backlinko, 2026). That's a lot of readers arriving through a single bio link.
The catch is that most creators aren't promoting just their newsletter. If your bio link also needs to point at a shop, a podcast, or your latest post, pointing it straight at Substack means everything else disappears. And once it's live, a raw Substack link tells you nothing about who clicked it or where they came from.
Using a Link-in-Bio Page Instead
A link-in-bio page keeps one link in your bio slot but turns it into a short menu: Subscribe to Substack, latest episode, shop, contact. You can:
- reorder or swap tiles anytime without editing your Instagram or TikTok profile,
- match the page to your brand instead of a generic Substack theme,
- see exactly how many people tapped the Substack tile versus everything else, broken down by country and device.
That last part answers the question raw links can't: is your bio actually driving subscribers, or just clicks that go nowhere? Trackable short links or a link-in-bio with analytics give you the real number instead of a guess.
Frequently Asked Questions
What's the best link to put in my bio for Substack?
Your Substack URL (yourname.substack.com) works directly if growing subscribers is your only goal. If your bio also needs to promote other things, use a link-in-bio page with Substack as one of several tiles.
Can I track how many people subscribe from my bio link?
Substack itself won't tell you that your Instagram bio specifically drove a subscription. A trackable link or link-in-bio page shows you clicks by source, so you can at least see how many people reached your Substack page from that bio link.
Should my whole bio link just be my Substack?
Only if your newsletter is genuinely the only thing you're promoting. Most creators juggle a newsletter alongside a shop, social channels, or other content, which is exactly the case a link-in-bio page is built for.
Get Substack Subscribers From Your Bio
A direct Substack link works, but it only ever promotes one thing. Add it to a link-in-bio page alongside everything else you do, and you'll finally see whether your bio link is actually turning visitors into subscribers.
