The price on the membership page is the price of the plan. The total at checkout is a little higher, because a payment gateway charge of 7.5% is added on top.
Nothing is being marked up quietly. The plan price is what UNI charges; the gateway charge is what it costs to take a card payment, and it is passed through at cost.
What each plan comes to

| Plan | Listed price | Total at checkout |
|---|---|---|
| Weekly | $9 | $9.67 |
| Monthly | $18 | $19.35 |
| Semester | $65 | $69.88 |
| Annual | $99 | $106.42 |
| Studio | $199 | $213.92 |
| Institutional | $499 | $536.42 |
The same 7.5% applies to competition hosting plans and to anything else bought through the shop.
Why you may see a slightly different figure
The membership page rounds the total to a whole dollar, so Annual reads $107 there and $106.42 at checkout. The figure in the table above is the one that leaves your account.
Help articles quote the total you pay. Where a plan's price is given without the charge, it is labelled as the listed price.
If the difference between the two is ever more than 7.5%, that is a bug and worth reporting through the contact form.