Rates get all the attention in CDN deals. The expensive surprises live elsewhere, in clauses most buyers skim on the way to the signature block.
Overage language
The question that matters: when usage exceeds commitment, what rate applies? At tier rate is fair. At list rate is a trap that turns a good month of traffic into a bad month of billing. Get the phrase billed at the committed tier rate into the order form, not the sales email. None of these clauses is malicious individually; collectively they encode who carries forecast risk, and by default that is you.
Minimums and true-ups
A monthly minimum you occasionally miss is a rounding cost. An annual commitment with a year-end true-up is a different creature: a deferred invoice that arrives after the budget closed. Prefer monthly minimums, and where annual commitments earn a materially better rate, size them to your certain floor. True-ups also interact badly with growth: a mid-year traffic surge that delights everyone in the revenue meeting can mature into an unbudgeted invoice in the finance meeting two quarters later.
One more clause family deserves its own paragraph: service credits. Most SLAs remedy downtime with credits against future spend, calculated by formulas that produce small numbers, claimed through processes that require you to notice and file. Read the remedy, not just the availability percentage: a 99.99% SLA whose breach pays you a sliver of one invoice is a marketing number wearing contractual clothing. Where downtime genuinely costs you, negotiate remedies that scale with your commitment, or at minimum, termination rights after repeated breach. The percentage attracts all the attention; the remedy paragraph decides whether it means anything.
Auto-renewal and notice windows
Ninety-day notice windows paired with automatic renewal exist to make forgetting expensive. Calendar the notice date the day you sign, and where possible negotiate renewal terms that require affirmative agreement rather than silence. The notice-window trap has a mirror image worth requesting: symmetric terms, where the provider also owes you notice of any pricing or term changes on renewal, in writing, inside the same window.
In practice
Print the contract and mark four things with an actual pen: the overage rate, the minimum and any true-up mechanics, the notice date, and the renewal mechanism. If any of the four takes more than a minute to find, that is itself information. These four marks, made once, are the cheapest risk management in infrastructure procurement.
Our contract review is part of every assessment: same hour, every clause that bites, flagged in plain language.