A custom domain does one thing that matters far more than branding: it separates your link's reputation from everyone else's. On a shared domain, another user's mistake becomes your problem. On your own, it cannot. That is the whole argument, and it costs between 6 and 14 dollars a year.
In our own data, the same link placed on a custom domain gets up to 27% more clicks than on a shared one. But the click rate is the smaller half of the story.
Why does a shared domain put your account at risk?
Reputation is scored at the domain, not at the account
Platforms do not evaluate your link in isolation. They evaluate the address it sits on, and they keep a running judgement of that address. This is not specific to Instagram or TikTok: it is how the whole industry treats web addresses. Spamhaus, which operates one of the most widely used domain reputation blocklistsOpens in a new tab, states two things worth remembering. An unknown domain starts with a poor reputation by default. And domain and IP reputations influence each other.
Building a good reputation takes far longer than destroying one.
One report can take down every account on the domain
If forty accounts point at the same address and one of them gets reported, the address becomes suspect. Every account attached to it inherits the problem, including the thirty-nine that did nothing wrong.
This is why our rule is one domain per account, not one per brand. Not one per campaign, not one per model, not one per agency. One per account. In agency and OFM setups, where a single operator runs several accounts from one place, this is the difference between losing one account and losing all of them in the same afternoon.
It is also the reason a TikTok link sometimes vanishes a day after being added, which we take apart in how to add a link to your TikTok bio.
What does a custom domain actually change?
Fewer automated checks
Moderation systems work by volume. A domain carrying traffic from thousands of unrelated accounts is a high-value target for automated scanning, because one detection there pays off many times over. A domain used by one account is not worth the same attention.
A link people are willing to click
A visitor reads the address before tapping it. An address that carries your name looks like it belongs to you, and that removes a small hesitation that costs conversions all day long. The 27% we measure is not a design effect. It is trust.
| Shared domain | Your own domain | |
|---|---|---|
| Who else uses it | Thousands of accounts | You |
| Effect of someone else's report | You inherit it | None |
| Attention from automated scanning | High | Low |
| What the visitor reads | A generic address | Your name |
| Cost | Included | 6 to 14 dollars a year |
| Recovery when flagged | Out of your hands | You change one thing and move on |
What does a custom domain cost, and is it worth it?
The real number
Between 6 and 14 dollars a year, depending on the extension. That is the whole expense.
The arithmetic nobody does
Put that next to what an account is worth to you. One restricted account costs more in a single week than a decade of domain renewals. And the loss is rarely one account, because the whole point of a shared address is that it is shared.
The question is not whether a custom domain is worth its price. It is whether your account is worth 14 dollars.
