How Far Back Does the Family History Question Go?

When a life insurance application asks about your family's health, it can feel as though it wants the entire family tree — every grandparent, every aunt, every cousin who died of something nobody quite remembers. It almost never does. How far back the family history question on a life insurance form actually goes is, in most cases, a single generation and one step sideways: your natural parents, and your brothers and sisters. That is the core of it.

The people underwriters call first-degree relatives — parents and siblings — are who the question is built around. Grandparents, aunts, uncles and cousins usually fall outside it entirely. Most forms also apply an age cut-off, asking only about conditions that appeared before a certain age, commonly before 60 and sometimes 65. A grandfather who had a heart attack at 82 is, for the purposes of the question, simply not what they are asking about.

This matters for two practical reasons. It tells you how much you actually need to find out before you apply, which is far less than a whole family's medical history. And it explains something that catches people out: two insurers can ask what looks like the same question, apply slightly different rules underneath it, and reach different decisions on identical facts. This article sets out what the question really covers, what it leaves out, and why the answers differ from one company to the next.

The short answer: usually just parents and siblings

Underwriting a life policy is an exercise in estimating risk from a limited set of questions, and family history is one input among several — usually a smaller one than your own health, your weight, whether you smoke and what you do for a living. Because it is a supporting factor rather than the main event, insurers keep the question tightly scoped. They want the relatives whose shared genetics are closest to yours, and that means the first degree: the people with whom you share, on average, half your genes.

So the honest answer to "how far back does it go" is: not far. One generation up, to your natural mother and father, and across to full brothers and sisters. That is the population the question is designed to capture, because it is where an inherited pattern shows up most clearly and most reliably. A condition in a parent and a sibling is a signal. The same condition in a great-aunt is noise, and insurers know it.

That scoping is deliberate and it is in your favour. It means you are not expected to reconstruct the medical history of relatives you never met or barely knew. It also means that if your worry is a dramatic illness two generations back, the form very probably is not asking about it at all.

What "first-degree relative" means, and who falls outside

A first-degree relative is a parent, a full sibling or a child. These are the relationships that share about half of your genes, and they are the ones the family history question is almost always confined to. Second-degree relatives — grandparents, aunts, uncles, half-siblings, nieces and nephews — share roughly a quarter, and cousins less again. Most application forms do not ask about them, and where a form has room for wider history it is usually optional context rather than a required answer.

People are often surprised that grandparents do not count, because a grandparent's early death can loom large in family memory. But from an underwriting point of view a grandparent is a generation too far to add much to the estimate, and including them would sweep in so much ordinary late-life illness that the signal would drown. The question stays narrow precisely so that a genuine inherited pattern stands out.

There is a related point worth making about how much family history predicts in the first place. It is a real risk factor, but it is a probabilistic nudge, not a verdict, and the science on how much of longevity is actually inherited is more measured than the folklore suggests. We look at that evidence in what the twin studies show about whether dying young is hereditary, which is a useful corrective if a run of early deaths in the family has you fearing the worst about your own odds.

The age cut-off most forms apply

The second thing that narrows the question is age. Most insurers only want to know about the relevant conditions where they appeared before a set age — commonly 60, sometimes 65, occasionally another figure. The reasoning is the same as the reasoning for sticking to close relatives: a heart condition that appears at 50 is far more likely to reflect an inherited susceptibility than the same condition appearing at 85, when it becomes an ordinary feature of ageing.

This is why a parent who developed heart disease in their eighties may not need to be declared at all under a question phrased around onset before 60, while a parent who developed it at 52 clearly does. The precise threshold is set by each insurer and is not a fixed rule across the market, so you should read the actual wording of the question in front of you rather than assume a standard age. If the form says "before 60", it means before 60.

The combination of the two filters — first-degree only, and before a set age — is what makes the family history question far more answerable than it first appears. Between them they strip out most of what makes family medical history feel unknowable, and leave a small, specific set of facts: did your parents or siblings develop one of a listed set of conditions, and if so, roughly when.

Which conditions the question is really about

Insurers are not interested in every illness a relative ever had. The family history question targets conditions with a recognised heritable component, the kind where a first-degree relative being affected genuinely shifts your own statistical risk. Typically that means heart disease and stroke, certain cancers, diabetes, polycystic kidney disease, and inherited neurological conditions.

The exact list differs from one insurer to another, which is part of why identical answers can produce different decisions. One company may ask specifically about bowel and breast cancer; another may phrase its cancer question more broadly or more narrowly. One may include a condition another leaves off entirely. You are answering a slightly different question each time, even when it looks like the same box.

A handful of conditions get special, separate treatment. Huntington's disease is the standout: it is the one inherited condition where, above a high level of life cover, an insurer is permitted to ask about a predictive genetic test result, under the industry code that otherwise keeps such results off applications. That single, tightly bounded exception is explained in the £500,000 line in Huntington's life cover. For everything else, the family history question is asking about diagnoses and events in your relatives, not about gene tests — and a predictive gene result of your own remains something they cannot request.

Source: Association of British Insurers (ABI), Code on Genetic Testing and Insurance, which sets the £500,000 life cover threshold and the single Huntington's exception.

Why two insurers reach different answers on the same facts

This is the part that unsettles people most, so it is worth being plain about. You can give two insurers word-for-word the same family history and receive two different outcomes. Neither has made a mistake. They simply weigh the same information through different underwriting rules.

Three things drive the divergence. First, the list of conditions asked about is not identical, so the same relative's illness may register with one insurer and not the other. Second, the age cut-offs differ, so a death at 61 might fall inside one company's question and outside another's. Third, and most significant, insurers weight the same declared history differently — how much a parent's early heart disease moves the terms, or whether two affected relatives are treated as materially worse than one, is a matter of each company's own underwriting philosophy and reinsurance.

The practical lesson is not to treat the first answer you get as the market's answer. If one insurer's assessment of your family history looks harsh, another may see it differently, which is exactly why comparing across the market matters rather than accepting a single quote. An FCA-authorised broker can place the same declared history in front of several insurers and find the one whose rules suit your particular pattern; you can start that by choosing to get life insurance quotes and letting the comparison do the work.

If a decision does go against you and you are not told why, that is worth pushing on. A vague adverse outcome can often be unpicked, and the principle of asking for the reasoning behind a decision — set out in the context of mental health history in why a decline on a mental health history is worth questioning — applies just as well to a family history one.

When you do not know the cause, what to actually write

Real families are not tidy. A parent you were estranged from, a sibling who died abroad, a "heart thing" or a "growth" that nobody ever named precisely — incomplete family history is the normal case, not the exception, and underwriters deal with it every day. The rule for handling it is simple and it is the opposite of what anxiety tells you to do: write down what you genuinely know, and mark the rest unknown.

Do not guess at a cause to fill a gap. An inaccurate answer given with false confidence is worse than an honest "cause unknown", because a confident wrong answer is the kind of thing that gets examined if a claim is ever made. If you know a relative died young but not of what, that is exactly what to say: died at such an age, cause not known to you. Underwriters are entirely used to that answer and have ways of pricing around uncertainty.

It also helps to know the limits of what an insurer can independently check, so you are neither over-disclosing out of fear nor imagining a surveillance that does not exist. An insurer works from what you tell them and, with your explicit consent, from a targeted medical report — the boundaries of which we set out in what a life insurer can and cannot see in your medical record. They cannot, for instance, quietly search your medication history; we explain why in why a UK insurer cannot search your prescriptions. Your family's medical history, in particular, is something only you can supply, and "not known" is a legitimate, expected entry.

Reasonable care, and what the law actually requires

Underneath all of this sits a single legal standard, and understanding it should lower rather than raise the temperature. When you fill in a life insurance application you are not promising perfect, exhaustive knowledge of your relatives. The Consumer Insurance (Disclosure and Representations) Act 2012 requires you to take reasonable care not to make a misrepresentation — to answer the questions asked honestly and carefully, judged against what a reasonable person in your position would have known and how clearly the question was put to you.

Source: Consumer Insurance (Disclosure and Representations) Act 2012, legislation.gov.uk. This Act applies across the whole of the United Kingdom, so the standard is the same in England, Wales, Scotland and Northern Ireland.

Reasonable care cuts both ways. It means you must not knowingly give a false answer — but it also means you are not penalised for failing to disclose something you had no reasonable way of knowing, and that a vaguely or badly worded question counts against the insurer, not you. Not knowing your estranged father's cause of death is not a failure of reasonable care. Guessing at it, and guessing wrong, could be a different matter. Honesty about the boundaries of your knowledge is precisely what the law asks for.

If you want the wider context on inherited risk — what insurers may ask, what they may not, and how much family history really predicts — our guide to family history, inherited risk and the odds pulls the whole subject together.

Frequently asked questions

How far back do life insurance family history questions go?

Most ask only about first-degree relatives, meaning your natural parents and your brothers and sisters. Grandparents, aunts, uncles and cousins usually fall outside the question altogether. Insurers also apply an age cut-off, commonly asking only about conditions that were diagnosed or occurred before 60 or 65. The precise age is set by each insurer, so it is worth reading the exact wording of the question you are being asked rather than assuming a standard threshold.

Which conditions do they ask about?

Typically those with a recognised inherited component: heart disease, stroke, certain cancers, diabetes, polycystic kidney disease and inherited neurological conditions such as Huntington's. The exact list differs by insurer, which is one of the reasons the same applicant can receive different answers from different companies. Most questions ask about your relatives' diagnoses and ages, not about genetic test results, which are governed separately.

What if a relative died young but I do not know the cause?

Say what you know and mark the rest unknown. Guessing at a cause is worse than admitting uncertainty, because an inaccurate answer given confidently is the kind of thing that causes trouble at claim stage. Recording that a relative died at a certain age with the cause not known to you is an honest, complete answer, and underwriters are entirely used to incomplete family information. Taking reasonable care means being accurate about what you do and do not know, not manufacturing certainty you do not have.