\nIt usually appears years after a death, quietly, through remarriage, new wills, or intestacy rules. By the time anyone realises, it\u2019s too late.
\nThis is preventable. But only if you plan for it on purpose.
\n
![\"sideways](\"https:\/\/www.inherrit.com\/blog\/wp-content\/uploads\/2026\/07\/Disinheritance3.png\")
<\/p>\nSideways inheritance sounds like jargon. It isn\u2019t. It\u2019s one of the most common ways children are accidentally cut out of an estate.
\nIt usually appears years after a death, quietly, through remarriage, new wills, or intestacy rules. By the time anyone realises, it\u2019s too late.
\nThis is preventable. But only if you plan for it on purpose.
\n<\/p>\n
Sideways inheritance (often called sideways disinheritance<\/em>) is where assets that you expected to pass down<\/strong> your family line end up going sideways<\/strong> into another family instead. Let\u2019s make this concrete.<\/p>\n Most married couples sign simple mirror wills:<\/p>\n \u201cI leave everything to my spouse, and if they die before me, then to our children equally.\u201d If someone dies without a valid will in England & Wales, the intestacy rules on gov.uk<\/a> apply. Another very common pattern:<\/p>\n Sideways inheritance is mainly about who<\/strong> gets what. But tax shapes how people structure things in the first place, so we need to look at it briefly. Picture this:<\/p>\n Sarah dies without a will:<\/p>\n The basic risk exists UK\u2011wide but some legal details differ by jurisdiction:<\/p>\n Scotland has strong legal rights<\/strong> for spouses\/civil partners and children over moveable estate (cash, investments etc.), regardless of what a will says. Heritable property (land\/buildings) sits outside legal rights but is still part of overall planning. in Northern Ireland succession law broadly mirrors England & Wales on intestacy structures and revocation by marriage\/civil partnership; there are some differences in terminology and court procedure but not enough to remove sideways risk without using trusts or specific gifts in wills drafted with NI law in mind.<\/p>\n in short: wherever you live in the UK, relying purely on \u201ceverything to my spouse\u201d is optimistic at best if you care about where assets land two relationships down the line.<\/p>\n Here are the arrangements that work in real life rather than just sounding clever on paper:<\/p>\n a life interest trust inside your will lets you split two ideas cleanly: Used correctly this structure still normally qualifies for spousal exemption for IHT under IHTA 1984 because it counts as an immediate post-death interest for a spouse; so we keep tax efficiency whilst ring\u2011fencing capital from sideways drift.<\/p>\n Where families are complicated \u2013 estranged adult child here, vulnerable beneficiary there \u2013 discretionary trusts give trustees flexibility instead of fixed entitlements: For sideways inheritance this matters because trustees do not have to follow whatever new partner enters the picture; their job under Trustee Act 1925 duties is to act for all beneficiaries fairly rather than pleasing one surviving spouse who may wish everything redirected elsewhere.<\/p>\n There are IHT complications with discretionary trusts \u2013 especially around ten-year charges \u2013 so these must be designed carefully around actual asset values rather than thrown into every cheap online will template by default.<\/p>\n Sometimes simplicity wins: leave some things directly where you want them now rather than hoping someone else passes them on voluntarily later: This doesn\u2019t solve every problem but it reduces how much can ever move sideways afterwards.<\/p>\n People sometimes hear about “mutual wills” as an answer: both spouses sign wills promising never to change them after one dies.<\/p>\n In practice these arrangements often cause more litigation than they avoid. My blunt view: use properly drafted life interest \/ discretionary trusts instead. There is another angle people rarely think about until crisis hits. If instead part passes into trust: This isn\u2019t about dodging responsibilities; it\u2019s about not having an entire lifetime\u2019s saving swallowed simply because legal structures were too naive.<\/p>\n Sideways loss doesn\u2019t only happen through remarriage or bad drafting. Tools like Inherrit<\/strong> help here: \ud83d\udca1 Pro tip:<\/strong> You’ve read about sideways inheritance. Now take the next step \u2014 our app helps you store your will, insurance policies, property deeds, and key contacts in one secure place, ready for when your family needs them.<\/p>\n Download on Google Play<\/a> \u00a0 Download on the App Store<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":" Sideways inheritance can cut your children out of your estate. Learn how wills and trusts can protect your family. Practical, UK\u2011specific guidance.<\/p>\n","protected":false},"author":1,"featured_media":187,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-186","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-legacy-planning"],"_links":{"self":[{"href":"https:\/\/www.inherrit.com\/blog\/wp-json\/wp\/v2\/posts\/186","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.inherrit.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.inherrit.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.inherrit.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.inherrit.com\/blog\/wp-json\/wp\/v2\/comments?post=186"}],"version-history":[{"count":2,"href":"https:\/\/www.inherrit.com\/blog\/wp-json\/wp\/v2\/posts\/186\/revisions"}],"predecessor-version":[{"id":191,"href":"https:\/\/www.inherrit.com\/blog\/wp-json\/wp\/v2\/posts\/186\/revisions\/191"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.inherrit.com\/blog\/wp-json\/wp\/v2\/media\/187"}],"wp:attachment":[{"href":"https:\/\/www.inherrit.com\/blog\/wp-json\/wp\/v2\/media?parent=186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.inherrit.com\/blog\/wp-json\/wp\/v2\/categories?post=186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.inherrit.com\/blog\/wp-json\/wp\/v2\/tags?post=186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nClassic pattern:<\/p>\n\n
\nLegally, nothing \u201cwrong\u201d has happened. Under the Wills Act 1837<\/strong>, any adult with capacity can change their will at any time. There is no obligation to keep a promise made to a late spouse about leaving assets to particular children.
\nThat\u2019s the sting in the tail: good intentions are not binding law.<\/li>\n<\/ol>\n
\nHow does sideways inheritance actually happen in England & Wales?<\/h2>\n
1. Mirror wills and remarriage<\/h3>\n
\nOn first death this works fine. The survivor inherits outright.
\nThe problem starts later:<\/p><\/blockquote>\n\n
\nEither way, what you left them can be redirected sideways very easily.<\/li>\n<\/ul>\n2. Intestacy after second marriages or new relationships<\/h3>\n
\nAs at 2024:<\/p>\n\n
\nIn blended families this is messy:<\/li>\n
\nYour side of the family fades out over a generation or two.<\/li>\n<\/ul>\n3. Divorce, old wills and forgotten updates<\/h3>\n
\n
\nThe original children get nothing from that parent\u2019s estate despite what was once written down years earlier.
\nSo sideways inheritance isn\u2019t theoretical. It\u2019s built into how English succession law works if you don\u2019t put guard rails in place.<\/li>\n<\/ul>\n
\nWhere does HMRC and Inheritance Tax fit into sideways inheritance?<\/h2>\n
\nUnder the Inheritance Tax Act 1984<\/strong>:<\/p>\n\n
\nBecause of that last point, many couples feel pushed towards \u201ceverything to each other\u201d wills for tax reasons. That structure maximises use of allowances between spouses but also maximises exposure to sideways inheritance risk later on.
\nThe good news: you can often use life interest trusts and similar structures and still<\/strong> secure both IHT efficiency and protection for children. You do not have to choose between tax planning and protecting your bloodline if it is drafted properly under the Trustee Act 1925<\/strong> framework and current HMRC practice.<\/li>\n<\/ul>\n
\nThe human side: a typical sideways inheritance scenario<\/h2>\n
\n
\nDavid dies first:<\/li>\n\n
\nThat sideways step cannot be fixed afterwards by \u201cchallenging\u201d anything unless there are very unusual facts such as lack of capacity or undue influence. In practice there usually aren\u2019t; it\u2019s just how the law works if nobody planned ahead properly.<\/li>\n<\/ul>\n
\nHow Scotland and Northern Ireland differ on sideways inheritance risk<\/h2>\n
Scotland<\/h3>\n
\nSo even if you try to cut out a child entirely in Scotland they may still claim legal rights against moveables; however houses can still shift sideways through remarriage or poor planning unless trusts or liferent arrangements are used sensibly within Scots law rules on liferents and special destinations.<\/p>\nNorthern Ireland<\/h3>\n
\nLegal tools that actually prevent sideways inheritance<\/h2>\n
1. Life interest trust (interest in possession trust)<\/h3>\n
\na) who can use<\/strong> an asset during their lifetime;
\nb) who should ultimately own<\/strong> it when they die or move into care\/sell up etc.
\ntypical use with a family home under English law:
\n– Your half share of the house goes into trust on your death;
\n– Your spouse has a right to live there for life (or until remarriage\/ cohabitation\/ moving into care \u2013 depending how we draft it);
\n– They may also receive income from investments placed in trust;
\n– But they never own those assets outright;
\n– On their death (or earlier trigger), capital passes automatically to your chosen beneficiaries \u2013 usually your children \u2013 regardless of what is written in your spouse\u2019s later will or who they\u2019ve married since you died.<\/p>\n2. Discretionary trusts<\/h3>\n
\n– You create a trust in your will;
\n– Name a class of potential beneficiaries (e.g. \u201cmy spouse, my children and remoter issue\u201d);
\n– Leave detailed guidance in a letter of wishes;
\n– Trustees decide who gets what and when based on circumstances over time rather than predictions made decades earlier.<\/p>\n3. Specific gifts outright<\/h3>\n
\n– Gift part of your ISA portfolio straight to adult children;
\n– Leave defined cash sums (\u201cpecuniary legacies\u201d) before residue goes anywhere;
\n– Give personal items with sentimental weight directly down your line rather than through spouses who might later drift away emotionally from stepchildren.<\/p>\n4. Avoiding mutual wills traps<\/h3>\n
\nThey rely heavily on equity imposing constructive trusts after death; they sit awkwardly alongside changing tax rules; they\u2019re inflexible if circumstances change radically.<\/p>\n
\nMutual wills should be rare edge-case tools used only with specialist advice.<\/p>\n
\nSideways inheritance meets social care fees and creditors<\/h2>\n
\nIf you leave everything outright to your spouse:
\n– Their entire enlarged estate may be assessed for means-tested care under the Care Act 2014<\/strong> framework;
\n– If they go bankrupt or face creditor claims later in life those inherited assets are fully exposed;
\n– On divorce from a second partner inherited wealth may form part of matrimonial pot subject to sharing orders.<\/p>\n
\n– Capital ring-fenced correctly inside certain types of trust is generally less exposed both for care assessment purposes and creditor issues (though local authorities do scrutinise “deliberate deprivation” cases hard);
\n– Your chosen beneficiaries retain ultimate entitlement even if life becomes financially messy for your surviving partner.<\/p>\n
\nWhere digital organisation helps: avoiding practical sideways loss<\/h2>\n
\nsometimes assets simply vanish because nobody knows they exist.
\nsavings accounts forgotten, premium bonds untraced, a small pension scheme never claimed.HMRC holds billions in unclaimed estates across various institutions over time.<\/p>\n
\nyou keep an encrypted inventory of bank accounts,pensions,policies,property details,even cryptocurrency wallets,alongside copies of your will,trust documents,and contact details for executors\/solicitors.
\nexecutors then know what exists,so fewer assets fall through cracks or drift into bona vacantia territory by neglect rather than intention.
\nrather than trying to remember every account every few years,you update one secure hub when something changes.<\/p>\n\n