The offer-stage insurance check: one week before you sign.

In short: The insurance terms of an expatriate posting are negotiable only between the offer landing and the signature. Four checks belong in that week: who is named on the policy and to what annual ceiling, whether a social-security agreement covers your two countries and who files the certificate of coverage, what the host country requires by law regardless of the package, and what the cover becomes at localisation.

There is a one-week window in every posting when its insurance terms are genuinely negotiable: the week between the offer landing and your signature. Before it, there is nothing to read. After it, the package is policy and the answers are whatever they are. The four checks below cost one evening inside that window — and they are the difference between negotiating from strength and discovering from weakness.

Check one: who is actually on the policy, and to what ceiling?

The offer says “comprehensive international health cover” and the policy schedule says something more specific: named members, an annual ceiling, a network, exclusions. Three reading points. The household: group policies define family their own way — confirm each person by name, because “family cover” and your family are different sets more often than HR expects. The ceiling against the host country’s prices: a limit that is generous in Lisbon is lunch money in Boston or Dubai’s private wings; read the number against where you are actually going. The gaps that are yours: maternity waiting periods, dental, the home-country clause for your visits back. Waiting periods are worth pricing against your own calendar rather than reading as boilerplate — a maternity wait that starts on the policy’s inception date is a different fact for a couple planning a child in year one than for anyone else, and it is one of the few items an employer can occasionally have adjusted at the point of setting the scheme up.

One line deserves separate attention because it is the one that silently reshapes everything else: the area of cover, the schedule’s statement of which countries treatment is paid for in. “Worldwide excluding USA and Canada” is a common and sensible economy until the role includes a quarterly trip to head office in Boston, and the mismatch between an area of cover written for a job description and the job actually performed is the single most ordinary finding in a review of employer cover. Ask for the full schedule, not the benefits summary — and ask now, while “could we extend the ceiling” is a negotiation item rather than a change request.

Check two: does a social-security agreement cover your two countries?

The least-asked, highest-value question at offer stage. Posted workers can often remain in the home system entirely, with a certificate of coverage — the document that tells the host country’s institutions that your contributions are already being paid elsewhere. The Japan–Switzerland agreement (in force since 2012, verified against the official enrolment guides) is a working example, and Québec’s agreement list can waive its three-month wait for arrivals from treaty countries including Switzerland.

When it applies, the certificate typically must be arranged around the posting’s start, through institutions that move at institutional speed. Discover the treaty a year in and you may have paid two systems for one life, with a refund process that is nobody’s priority but yours.

One boundary worth drawing, because it is where the question is usually over-read: an agreement settles which country’s social security you contribute to. It does not, by itself, decide whether you hold adequate medical cover where you are actually living. Those are two questions, and answering the first well does not answer the second at all — a household correctly exempted from the host system can still be thinly covered inside it. The check costs twenty minutes; ask who files, ask what the certificate covers and what it does not, and put both answers in the offer correspondence.

Check three: what does the host country demand anyway?

An employer package does not override host law, and some hosts mandate things no foreign group policy satisfies. Japan compels residents past three months into its national scheme regardless of other cover. Dubai requires a DHA-compliant local policy — and places your dependants’ cover on you as sponsor, not on your employer, a split that surprises arriving families yearly. Both are verified on our country pages, along with twenty-one others.

The pattern to internalise is that generous and compliant are separate properties, and that the failure mode runs in both directions. A package can leave you legally exposed while feeling luxurious. It can equally leave you paying twice — an international plan on top of a locally mandated policy that already covers the same treatment in the same hospital. Neither shows up on a benefits summary. Read the host country’s page before assuming the package authors did.

Check four: what does the package become at localisation?

Expat packages end — contracts localise, assignments convert, companies restructure — and the day it happens, the group policy’s logic changes with your family’s cover, in whatever country and at whatever age the career has reached. Localisation is simply the moment your employment converts from an expatriate assignment to a local contract, and it is usually the moment the international health plan stops and something domestic starts, if anything starts at all.

At offer stage you can ask the questions that have no good answers later: what exactly happens to cover at localisation; can continuation or a conversion option be written in now; and if the assignment ends early, what bridges the gap? The households that saw localisation coming negotiated cover into it. The ones that did not met it as a renewal surprise, at an age where individual underwriting has more to ask about than it did at signing.

If the answer to all three is no — and it often is, because these terms sit above the hiring manager’s authority — the check has still done its work. A written no tells you that the family’s long-term cover is your project rather than the company’s, and that the sensible time to start it is now, while you are healthy, employed and holding a group plan that makes any private layer a supplement rather than a rescue.

What exactly do you ask, and what does each answer tell you?

Put these in one email, in the offer thread, before you sign. The answers matter, and so does how quickly they arrive.

“Could you send the full policy schedule rather than the benefits summary?” A programme that produces it within days has a designed scheme and someone who administers it properly. “You’ll get the details at onboarding” is itself an answer: every later question will run at that speed too.

“Please confirm each household member by name and date of birth on the policy.” A list is an answer. “Family cover is included” is not, and the difference is discovered at a paediatric admission.

“What is the annual ceiling — per person or per family — and in which currency?” A per-family ceiling is a shared pot that one serious event empties for everyone. A ceiling denominated in a currency other than the host country’s is a limit that erodes quietly.

“What is the area of cover, and does it include the countries I will travel to for this role?” If the role and the area of cover disagree, that is fixable in one line now and a claim dispute later.

“Is there a social-security agreement between [home] and [host], and who files the certificate of coverage?” An employer who names the institution has done this before. “That’s the employee’s responsibility” is workable, but tells you to start immediately.

“What does the host country require by law, and does the package satisfy it or sit on top of it?” “It’s all covered” without naming the local requirement means nobody has checked.

“Is the group written on medical-history-disregarded terms, or is there individual underwriting or a pre-existing-condition clause?” This is the question that decides whether a condition already in your household travels with you or is left behind at the border.

“If the assignment ends early, on what date does cover stop?” End of employment, end of notice period and end of that calendar month are three different dates and three different exposures.

“At localisation, what happens to health cover, and can a continuation or conversion option be written in now?” A written no is more useful than silence: it tells you to build a private layer while you are young enough for it to be cheap.

When is the offer-stage check not worth an evening?

Sometimes the honest answer is that twenty minutes will do. A short posting inside a system you already belong to, with no dependants, no conditions and no third-country travel, does not need four checks — it needs the area of cover confirmed and the start date matched to the end of your existing cover. Employees of organisations with mature, well-designed mobility programmes frequently find every question above already answered in the documentation, which is a good sign about the employer and a fast evening for you.

The check is not about distrusting the employer. It is about the fact that a package is designed for a population and you are one household — and the places where the two diverge are exactly the places nobody has looked at yet.

How do you run all four in one evening?

Get the actual policy schedule and read your household against it. Ask the treaty question in writing. Read the host country’s page for what the law demands regardless. Ask what the package becomes at localisation. Four items, one evening, inside the only week they are negotiable — and if you would rather run them with someone who reads these documents for a living, bring the offer to a consultation before you sign, not after. That sequencing is the whole trick.