This is one of the most consistently misunderstood pieces of Central American travel planning, and I got it wrong myself the first time I read into it. The CA-4 visa 90 days rule does not mean you get 90 days in Guatemala, then another fresh 90 in Honduras, then another 90 in El Salvador. It means you get 90 days total, combined, across all four countries. Get this wrong and you can end up overstaying without realizing it, which matters a lot when your plan involves crossing several of these borders overland, like mine does.
What the CA-4 agreement actually is
Guatemala, Honduras, El Salvador, and Nicaragua operate under the CA-4 Border Control Agreement (Central America-4). For immigration purposes, these four countries function as a single zone for most foreign visitors, similar in concept to the Schengen Area in Europe. Cross from Guatemala into Honduras overland, and in most cases there's no new entry stamp or fresh visa — you're still inside the same 90-day clock that started when you first entered any one of the four.
The mistake almost everyone makes
The intuitive assumption — because it's how visas usually work — is that each country grants its own separate 90 days. Under CA-4, that's wrong. Here's the difference laid out directly:
| What people assume | What actually happens |
|---|---|
| 90 days in Guatemala + 90 in Honduras + 90 in El Salvador + 90 in Nicaragua = 360 days total | 90 days total, shared across all four countries combined |
| Crossing a CA-4 border resets the clock | Crossing a CA-4 internal border does not reset anything — the clock keeps running from your first entry |
So if you enter Guatemala and spend 40 days there, then cross into Honduras, you don't get a new 90 — you have 50 days left before you need to either leave the CA-4 zone entirely or extend.
How to actually reset the clock
The 90-day CA-4 clock resets when you exit the four-country zone entirely — not just cross an internal border within it. Practically, that means leaving to a country outside CA-4. For travelers heading south, the natural way to do this is continuing into Costa Rica or Panama, both of which sit outside the CA-4 agreement and issue their own separate entry stamps.
Crossing from Nicaragua into Costa Rica, for example, ends your CA-4 time and starts a fresh Costa Rican entry period. If you later re-enter the CA-4 zone (say, back into Nicaragua or Honduras), you get a new 90-day clock, assuming immigration rules haven't changed by then — this is exactly the kind of detail worth confirming at the actual border, since interpretation and enforcement have varied over the years.
Panama's different rule — good news for Canadians
Panama isn't part of CA-4 and runs its own entry rules. For Canadian citizens specifically, Panama has historically granted up to 180 days on entry — double the CA-4 allowance — which makes it a meaningfully different planning consideration if you're Canadian and want more runway before needing to think about visas again. Other nationalities often get a shorter standard stay in Panama, so this isn't universal — check your specific passport's allowance before assuming the 180-day figure applies to you.
What overstaying actually costs you
Overstay penalties in CA-4 countries are typically financial — a per-day fine assessed when you eventually leave — rather than an automatic ban, but the specifics (amount, whether it scales, whether it triggers an entry ban above a certain threshold) vary by country and change periodically. None of that is worth risking to save yourself the admin of tracking a calendar. A few practical habits:
- Write down your actual CA-4 entry date the moment you cross into any of the four countries — not the date you think you'll need it.
- Count backward from 90, not forward from zero, so you're always aware of the number of days remaining rather than days used.
- Build in a buffer — don't plan to exit on day 89 if a border crossing could be delayed by a day.
- Confirm current fee/penalty structures at a border post or with an embassy before relying on anything you read online, including this — these rules and figures get updated.
Why this matters for an overland route specifically
My own route runs Belize, then Guatemala, Honduras, Nicaragua, and Costa Rica before continuing on. Belize is not part of CA-4, so that leg doesn't count against the clock. But Guatemala through Nicaragua is three CA-4 countries back to back, and if I'm not tracking the combined 90 days carefully, it's entirely possible to arrive in Nicaragua with far less runway than expected, especially with unplanned delays — vehicle issues, border closures, weather — eating into the count along the way.
Bottom line
Treat CA-4 as one 90-day allowance for Guatemala, Honduras, El Salvador, and Nicaragua combined, not four separate ones. Costa Rica and Panama sit outside the agreement and reset your clock when you cross into them. Canadians get a longer standard stay in Panama specifically. None of this is exotic knowledge — it's published by each country's immigration authority — but it's misunderstood often enough that it's worth getting right before you're standing at a border finding out the hard way.