How long does AEO take to work?

There isn’t a universal timeline, and anyone who hands you one is selling a calendar, not an outcome. Here’s what’s honestly knowable. Some changes show up as fast as engines re-read your pages. Some take months. And the newest data adds a wrinkle almost nobody prices in: AI answers get rebuilt so often that showing up once is the easy part. Staying there is the real work.

The two clocks

AEO runs on two clocks, and they tick at different speeds. The first clock is retrieval. When an engine answers with live web search, it works from what its crawler fetched recently. Fix your pages, and the fix can reach answers as soon as the crawler returns. Days to weeks. The second clock is the engine’s own memory: what it knows about your name without looking up anything. This updates slowly, as models retrain and as the wider web builds evidence about you. Months, not days, and it varies by engine. Most of the frustration with AEO timelines comes from expecting the first clock’s speed on the second clock’s work.

What ten months of tracking shows

The tracking platform Trakkr measured how long AI citations actually last, across 857,138 reports covering 10,991 brands on eight AI platforms over ten months. Two findings matter here. First, the median brand’s citation count falls to half its peak in 31 days. They call it citation half-life, and it means a visibility win left alone starts eroding in a month. Second, 73.5 percent of cited URLs appear exactly once and never return. The typical citation doesn’t fade. It’s simply gone the next time the answer gets built.

The study is fair about its own limits: part of any drop from a peak is just falling back from an unusually good run. But the shape of the finding stands. AI answers don’t hold still the way rankings used to.

The good news hiding in the churn

Read those numbers again from the other side. If answers get rebuilt constantly, the door opens constantly. There’s no entrenched winner sitting on position one for years the way search rankings allowed. A site that’s readable, quotable, and backed by outside evidence gets fresh chances at the answer every time it’s rebuilt, which is daily. The churn that erodes lazy wins is the same churn that lets prepared newcomers in fast.

Why you keep hearing other numbers

Notice who quotes which timeline. Tools that scan your page promise results right away, because a score can change right away. Agencies on retainers quote six to twelve months, because retainers run six to twelve months. Neither number describes your outcome. Both describe the seller’s product. The honest version has to name two clocks and a churn rate, which makes a worse sales pitch but a better plan. When someone hands you a single number, ask which clock it’s on, and ask what happens after day 31.

The honest timeline, piece by piece

• Readability fixes. Fast. A page an engine couldn’t read becomes usable at the next crawl. Days to weeks.
• Citability work. Nearly as fast. Answer-first rewrites and clean structure can be quoted as soon as they’re re-fetched. Weeks.
• Namability. The slow clock. Engines name who the wider web backs up, and outside evidence accumulates on its own schedule. Months, and it varies by engine.
• Holding your place. Ongoing. The 31-day half-life means presence in answers is something you maintain, not something you finish.

What this means for how you buy AEO

Treat AEO as a practice with a project at the front, not a project with an ending. The fixes are real and they land fast. But a one-time fix left alone starts decaying on the same 31-day clock as everyone else’s wins. This is why we keep testing the same questions after changes go in, and why the only real measure of visibility is asking engines on a schedule. The timeline question answers itself once you measure monthly: you watch what moved, what held, and what needs the next push.

What to do about it

Start the fast clock today. Run the free single-page scan and fix what it flags, because those fixes pay off at the next crawl. Then set a monthly date with the questions your customers ask, across engines, and track who gets named. If you’d rather have the whole thing measured properly, an AI Visibility Audit establishes the baseline and monitoring keeps score from there.

How long does AEO take? Days for the first wins, months for the durable ones, and ongoing for keeping them. Anyone who quotes you just a single number is describing a different job.