{"id":7045728,"date":"2026-08-24T07:16:56","date_gmt":"2026-08-24T07:16:56","guid":{"rendered":"https:\/\/peraltafinancing.com\/accounting\/do-i-need-to-complete-a-tax-return-a-uk-checklist-for-2026-27\/"},"modified":"2026-08-24T07:16:56","modified_gmt":"2026-08-24T07:16:56","slug":"do-i-need-to-complete-a-tax-return-a-uk-checklist-for-2026-27","status":"publish","type":"post","link":"https:\/\/fivemor.com\/?p=7045728","title":{"rendered":"Do I need to complete a tax return? A UK checklist for 2026\/27"},"content":{"rendered":"<p> <br \/>\n<\/p>\n<div id=\"hs_cos_wrapper_post_body\">\n<h2>Tom Biggs ACA CTA explains the scenarios for exactly when you need to think about filing a tax return and what to consider.<!--more--><\/h2>\n<p>As a firm of accountants and advisors, some of the most common questions we hear from new clients are:<\/p>\n<ul>\n<li>&#8216;Do I need to <span style=\"color: #00bce4;\"><a href=\"https:\/\/www.wellersaccountants.co.uk\/how-to-avoid-errors-and-fines-from-your-online-tax-return-lp\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">complete a tax return<\/a><\/span>?&#8217;<\/li>\n<li>&#8216;Does this actually apply to me?&#8217;\u00a0<\/li>\n<li>&#8216;What happens if I should&#8217;ve filed\u00a0a return, but didn&#8217;t?&#8217;<\/li>\n<\/ul>\n<p>If you&#8217;re asking yourself these questions then you&#8217;re not alone.\u00a0<\/p>\n<p>It&#8217;s common to many business owners, freelancers, and individuals.\u00a0<\/p>\n<p>The honest answer is that not everyone does but if you should and you then don&#8217;t, that will cause you financial headache&#8217;s and problems.\u00a0<\/p>\n<p>That&#8217;s why we&#8217;ve produced this blog post, so that you don&#8217;t have to rely on guesswork and can instead reference this <span style=\"font-weight: bold;\">tax return checklist<\/span> to provide you with a clear indicator as to what you need to do.\u00a0<\/p>\n<p><!--HubSpot Call-to-Action Code --><span class=\"hs-cta-wrapper\" id=\"hs-cta-wrapper-5eb1a485-3107-43bf-bd7f-ba72d5b30f69\"><span class=\"hs-cta-node hs-cta-5eb1a485-3107-43bf-bd7f-ba72d5b30f69\" id=\"hs-cta-5eb1a485-3107-43bf-bd7f-ba72d5b30f69\"><!--[if lte IE 8]>\n\n<div id=\"hs-cta-ie-element\"><\/div>\n\n<![endif]--><a href=\"https:\/\/cta-redirect.hubspot.com\/cta\/redirect\/2284600\/5eb1a485-3107-43bf-bd7f-ba72d5b30f69\"><img loading=\"lazy\" decoding=\"async\" class=\"hs-cta-img\" id=\"hs-cta-img-5eb1a485-3107-43bf-bd7f-ba72d5b30f69\" style=\"border-width:0px;margin: 0 auto; display: block; margin-top: 20px; margin-bottom: 20px\" height=\"150\" width=\"650\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/2284600\/5eb1a485-3107-43bf-bd7f-ba72d5b30f69.png\" alt=\"Get the checks to ascertain if you need to file a tax return. \" align=\"middle\"\/><\/a><\/span><\/span><!-- end HubSpot Call-to-Action Code -->Quick links to sections covered in this blog post include:<\/p>\n<p><a id=\"What\" data-hs-anchor=\"true\"\/><\/p>\n<h2>1. What is a Self Assessment Tax Return? (A simple\u00a0explanation)<\/h2>\n<p>A Self Assessment Tax Return is what you use to tell HM Revenue &amp; Customs (HMRC) about any of your <span style=\"font-weight: bold;\">income that hasn&#8217;t already been taxed automatically<\/span>. In simple terms this means if HMRC doesn&#8217;t already know about your income through Pay As You Earn (PAYE) then you&#8217;ll usually need to report it yourself.\u00a0<\/p>\n<p>Examples of this can include:<\/p>\n<p>Once you submit your tax return then HMRC calculates how much you owe and informs you as to when it needs to be paid, this is referred to as <span style=\"color: #00bce4;\"><a href=\"https:\/\/www.wellersaccountants.co.uk\/blog\/payment-on-account\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">payments on account<\/a><\/span>.\u00a0 <br \/><a id=\"Checklist\" data-hs-anchor=\"true\"\/><\/p>\n<h2>2. Quick checklist: Do any of these apply to you?\u00a0<\/h2>\n<p>If you tick any of the below boxes, then there&#8217;s a strong chance that you&#8217;ll need to complete a Self Assessment Tax Return.\u00a0<\/p>\n<p><span style=\"font-weight: bold;\">a) You&#8217;re self employed (even part-time)<\/span><\/p>\n<p>If you earn more than \u00a31,000 from <span style=\"font-weight: bold;\">self-employment<\/span>, you&#8217;ll usually need to file a tax return.\u00a0<\/p>\n<p>This is particularly relevant to:<\/p>\n<ul>\n<li><span style=\"color: #00bce4;\"><a href=\"https:\/\/www.wellersaccountants.co.uk\/blog\/what-is-tax-deductible-for-influencers\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">Influencers<\/a><\/span><\/li>\n<li>Freelancers<\/li>\n<li>Sole traders<\/li>\n<li>Side hustles that generate additional income streams<\/li>\n<\/ul>\n<p>The above applies even if it&#8217;s not your main source of income.\u00a0<\/p>\n<p><span style=\"font-weight: bold;\">b) You&#8217;re a company director<\/span><\/p>\n<p>If you run a <span style=\"color: #00bce4;\"><a href=\"https:\/\/www.wellersaccountants.co.uk\/blog\/the-8-things-to-action-in-a-limited-company-formation\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">limited company<\/a><\/span>, you&#8217;ll often need to complete a tax return and this is the case especially if you&#8217;re taking:<\/p>\n<ul>\n<li>Dividends<\/li>\n<li>A combination of dividends and salary<\/li>\n<\/ul>\n<p><span style=\"font-weight: bold;\">c) You have untaxed income<\/span><\/p>\n<p style=\"font-weight: normal;\"><span>This is a scenario that often catches people out. It&#8217;s important you understand and remember this, if HMRC\u00a0haven&#8217;t already taxed your income, then it&#8217;s <span style=\"font-weight: bold;\">your responsibility to declare it<\/span>!<\/span><\/p>\n<p style=\"font-weight: normal;\"><span>Examples of that income can include:<\/span><\/p>\n<ul>\n<li style=\"font-weight: normal;\"><span>Interest generated from <strong>savings<\/strong><\/span><\/li>\n<li style=\"font-weight: normal;\"><span><strong>Rental income<\/strong> from property<\/span><\/li>\n<li style=\"font-weight: normal;\"><span>Dividends<\/span><\/li>\n<li style=\"font-weight: normal;\"><strong>Foreign income<\/strong><\/li>\n<\/ul>\n<p><span>If tax hasn&#8217;t been deducted then the <span style=\"font-weight: bold;\">onus is on you to report it<\/span>. <\/span><\/p>\n<p><span\/><span style=\"font-weight: bold;\">d) You&#8217;ve sold assets\u00a0<\/span><\/p>\n<p><span>If you&#8217;ve sold assets and made a gain then you&#8217;ll need to report this for <span style=\"color: #00bce4;\"><a href=\"https:\/\/www.wellersaccountants.co.uk\/blog\/what-is-capital-gains-tax-in-the-uk\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">Capital Gains Tax<\/a><\/span>. A gain refers to the profit made when you sell, gift, or exchange an asset for more than you paid for it. The increase in value is taxed. Assets can include:<\/span><\/p>\n<ul>\n<li><span>A <span style=\"font-weight: bold;\">second property<\/span> (you&#8217;ll also <span style=\"font-weight: bold;\">have to file a<\/span> <span style=\"color: #00bce4;\"><a href=\"http:\/\/www.wellersaccountants.co.uk\/blog\/what-is-capital-gains-tax-in-the-uk#When\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">CGT 60-day return<\/a><\/span>)<\/span><\/li>\n<li><strong>Shares and investments<\/strong><\/li>\n<\/ul>\n<p><span style=\"font-weight: bold;\">e) HMRC requests one<\/span><\/p>\n<p>If you receive a <span style=\"font-weight: bold;\">notification from HMRC to complete a return<\/span> then you must do it. It has to happen even if you don&#8217;t think you owe anything.\u00a0<\/p>\n<p><a id=\"Scenarios\" data-hs-anchor=\"true\"\/><\/p>\n<h2>3. Scenarios where you might not need to complete a tax return<\/h2>\n<p>You may not need to file if:<\/p>\n<ul>\n<li>All your income is taxed through PAYE<\/li>\n<li>You don&#8217;t have any additional income streams<\/li>\n<li>HMRC hasn&#8217;t contacted you to file a return<\/li>\n<\/ul>\n<p>Just be warned, mistakes can easily happen based on assumption that you&#8217;re covered, when actually you&#8217;re not!<\/p>\n<p><a id=\"Reality\" data-hs-anchor=\"true\"\/><\/p>\n<h2>4. A reality check<\/h2>\n<p>As mentioned earlier, most personal tax issues don&#8217;t come from people deliberately ignoring matters. They come from people assuming, and <span style=\"font-weight: bold;\">not fully comprehending tax legislation<\/span> in relation to their personal finances:\u00a0<\/p>\n<p style=\"padding-left: 40px;\">&#8216;I didn&#8217;t realise this applied to me&#8217;.\u00a0<\/p>\n<p>Examples of this can include:<\/p>\n<ul>\n<li>Starting a side hustle this year<\/li>\n<li>Extracting dividends for the first time<\/li>\n<li>Renting out a property<\/li>\n<li>Enjoying a particularly strong financial year<\/li>\n<\/ul>\n<p>So, if this sounds familiar then review this post, <span style=\"color: #00bce4;\"><a href=\"https:\/\/www.wellersaccountants.co.uk\/how-to-avoid-errors-and-fines-from-your-online-tax-return-lp\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">consult a tax professional<\/a><\/span> if you&#8217;re not sure, but above all else, don&#8217;t just assume you don&#8217;t need to file a tax return.\u00a0<\/p>\n<p><a id=\"Happens\" data-hs-anchor=\"true\"\/><\/p>\n<h2>5. What happens if you should file, but don&#8217;t?<\/h2>\n<p>Unfortunately many people don&#8217;t consider this until it&#8217;s too late. If you <span style=\"font-weight: bold;\">fail to complete a tax return<\/span> when required then:<\/p>\n<ul>\n<li>You may receive an automatic \u00a3100 penalty<\/li>\n<li>More penalties can build up over time<\/li>\n<li>Interest can be applied to any unpaid tax amount<\/li>\n<li>HMRC may also <span style=\"color: #00bce4;\"><a href=\"https:\/\/www.wellersaccountants.co.uk\/blog\/hmrc-tax-investigations-how-to-prepare-your-business-for-them\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">open an enquiry<\/a><\/span> into your financial affairs<\/li>\n<\/ul>\n<p>Furthermore HMRC increasingly has access to more data than people may care to realise. Don&#8217;t therefore rely on hoping you won&#8217;t be picked up would be\u00a0our advice.\u00a0<\/p>\n<p><!--HubSpot Call-to-Action Code --><span class=\"hs-cta-wrapper\" id=\"hs-cta-wrapper-8d2a2942-9c57-4a50-951b-60a38a0e6e1b\"><span class=\"hs-cta-node hs-cta-8d2a2942-9c57-4a50-951b-60a38a0e6e1b\" id=\"hs-cta-8d2a2942-9c57-4a50-951b-60a38a0e6e1b\"><!--[if lte IE 8]>\n\n<div id=\"hs-cta-ie-element\"><\/div>\n\n<![endif]--><a href=\"https:\/\/cta-redirect.hubspot.com\/cta\/redirect\/2284600\/8d2a2942-9c57-4a50-951b-60a38a0e6e1b\"><img loading=\"lazy\" decoding=\"async\" class=\"hs-cta-img\" id=\"hs-cta-img-8d2a2942-9c57-4a50-951b-60a38a0e6e1b\" style=\"border-width:0px;margin: 0 auto; display: block; margin-top: 20px; margin-bottom: 20px\" height=\"150\" width=\"650\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/2284600\/8d2a2942-9c57-4a50-951b-60a38a0e6e1b.png\" alt=\"Click me\" align=\"middle\"\/><\/a><\/span><\/span><!-- end HubSpot Call-to-Action Code --><\/p>\n<p><span style=\"font-weight: bold;\">Can I just ignore this?<\/span><\/p>\n<p>In short, no.\u00a0<\/p>\n<p>If you&#8217;re likely to need to be filing then ignoring it can lead to:<\/p>\n<ul>\n<li>Automatic penalties<\/li>\n<li>Increasing fines<\/li>\n<li>The stress of dealing with HMRC to then file a return subsequently<\/li>\n<\/ul>\n<p>As a rule it&#8217;s better to <strong>check early when it comes to tax<\/strong> than end up fixing things later.\u00a0<br \/><a id=\"When\" data-hs-anchor=\"true\"\/><\/p>\n<h2>6. When do you need to register?<\/h2>\n<p>If you need to complete a tax return then you usually have to <span style=\"font-weight: bold;\">register by 5 October<\/span> following the end of <span style=\"color: #00bce4;\"><a href=\"https:\/\/www.wellersaccountants.co.uk\/blog\/why-does-the-uk-tax-year-start-in-april\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">the tax year<\/a><\/span> in which you made your income.\u00a0<\/p>\n<p>Don&#8217;t leave it too late, this delays the whole process and can leave you at risk of penalties.\u00a0<\/p>\n<p><a id=\"Think\" data-hs-anchor=\"true\"\/><\/p>\n<h2>7. A simple way to think about it<\/h2>\n<p>If you&#8217;re still unsure if you need to fill in a tax return then consider if the following apply to you:<\/p>\n<ul>\n<li>You earn money outside of PAYE<\/li>\n<li>You have multiple sources of income<\/li>\n<li>Your financial situation has changed significantly this year<\/li>\n<\/ul>\n<p>Here&#8217;s the thing, by the time you get to January:<\/p>\n<ul>\n<li>The deadline is close meaning there&#8217;s <strong>not much time<\/strong> to prepare and file<\/li>\n<li><strong>Pressure<\/strong> then likely increases<\/li>\n<li><strong>Mistakes<\/strong> become more likely to occur<\/li>\n<\/ul>\n<p><a id=\"Clarity\" data-hs-anchor=\"true\"\/><\/p>\n<h2>8. Getting clarity through professional advice<\/h2>\n<p>You may have ticked one of the bullet points from above. So, now you know a tax return may be needed, but you aren&#8217;t totally sure as to why. It&#8217;s sensible to pause and ask this question, better to double check than get things wrong.\u00a0<\/p>\n<p>That&#8217;s why we recommend <span style=\"color: #00bce4;\"><a href=\"https:\/\/www.wellersaccountants.co.uk\/how-to-avoid-errors-and-fines-from-your-online-tax-return-lp\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">a quick conversation with us<\/a><\/span> which can:<\/p>\n<ul>\n<li><strong>Confirm <\/strong>if you really do need to file a return<\/li>\n<li>Help you <strong>plan ahead and budget<\/strong><\/li>\n<li>Provide you with <strong>peace of mind<\/strong> as to what needs to be reported<\/li>\n<li>Ensure you don&#8217;t fall foul of late filings, missed payments, and penalties<\/li>\n<\/ul>\n<p><a id=\"Do\" data-hs-anchor=\"true\"\/><\/p>\n<h2>9. What to do next?<\/h2>\n<p>If you think, or you&#8217;ve confirmed, that you need to file a tax return, the next step is to understand:<\/p>\n<ul>\n<li>How the process works<\/li>\n<li>The information you&#8217;ll need to supply<\/li>\n<li>The deadlines you need to plan around<\/li>\n<\/ul>\n<p>Here is a link to the <span style=\"color: #00bce4;\"><a href=\"https:\/\/www.wellersaccountants.co.uk\/what-we-need-to-complete-your-tax-return\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">tax return page and aide memoire<\/a><\/span> we supply to our clients shortly after the beginning of the new tax year. Whilst considerable, it&#8217;s an indicative but not exhaustive list of the kinds of items relevant to this process. \u00a0\u00a0\u00a0<\/p>\n<p><a id=\"Summary\" data-hs-anchor=\"true\"\/><\/p>\n<h2>10. A tax return summary<\/h2>\n<p>So remember, you&#8217;ll likely need to register and complete a tax return if you:<\/p>\n<ul>\n<li>Are self-employed<\/li>\n<li>Receive any untaxed income<\/li>\n<li>Are a company director<\/li>\n<li>Have received a request to file by HMRC<\/li>\n<\/ul>\n<p>If none of the above is applicable, you may not need to apply but it&#8217;s most likely worth <span style=\"color: #00bce4;\"><a href=\"https:\/\/www.wellersaccountants.co.uk\/how-to-avoid-errors-and-fines-from-your-online-tax-return-lp\" rel=\"noopener\" style=\"font-weight: bold; color: #00bce4;\">checking in with us<\/a><\/span> to make sure.\u00a0<\/p>\n<p><!--HubSpot Call-to-Action Code --><span class=\"hs-cta-wrapper\" id=\"hs-cta-wrapper-0fa7e71e-516c-46d7-a3ca-c5f7c45723d6\"><span class=\"hs-cta-node hs-cta-0fa7e71e-516c-46d7-a3ca-c5f7c45723d6\" id=\"hs-cta-0fa7e71e-516c-46d7-a3ca-c5f7c45723d6\"><!--[if lte IE 8]>\n\n<div id=\"hs-cta-ie-element\"><\/div>\n\n<![endif]--><a href=\"https:\/\/cta-redirect.hubspot.com\/cta\/redirect\/2284600\/0fa7e71e-516c-46d7-a3ca-c5f7c45723d6\"><img loading=\"lazy\" decoding=\"async\" class=\"hs-cta-img\" id=\"hs-cta-img-0fa7e71e-516c-46d7-a3ca-c5f7c45723d6\" style=\"border-width:0px;margin: 0 auto; display: block; margin-top: 20px; margin-bottom: 20px\" height=\"281\" width=\"650\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/2284600\/0fa7e71e-516c-46d7-a3ca-c5f7c45723d6.png\" alt=\"Find out if you need to complete a tax return.\" align=\"middle\"\/><\/a><\/span><\/span><!-- end HubSpot Call-to-Action Code --><\/p>\n<p><span style=\"font-size: 11px;\">The content of this post was created on 11\/05\/2026 and updated on 12\/05\/2026.<\/span><\/p>\n<p><span style=\"font-size: 11px;\">Please be aware that information provided by this blog is subject to regular legal and regulatory change. We recommend that you do not take any information held within our website or guides (eBooks) as a definitive guide to the law on the relevant matter being discussed. We suggest your course of action should be to seek legal or professional advice where necessary rather than relying on the content supplied by the author(s) of this blog. \u00a0<\/span><\/p>\n<p>\u00a0<\/p>\n<\/div>\n<p><script>(function(d, s, id) {\n  var js, fjs = d.getElementsByTagName(s)[0];\n  if (d.getElementById(id)) return;\n  js = d.createElement(s); js.id = id;\n  js.src = \"\/\/connect.facebook.net\/en_GB\/sdk.js#xfbml=1&version=v3.0\";\n  fjs.parentNode.insertBefore(js, fjs);\n }(document, 'script', 'facebook-jssdk'));<\/script><br \/>\n<br \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tom Biggs ACA CTA explains the scenarios for exactly when you need to think about filing a tax return and what to consider.<\/p>\n","protected":false},"author":1,"featured_media":7045729,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11759],"tags":[14380,3037,4489,7356],"dealstore":[],"offerexpiration":[],"class_list":["post-7045728","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-accounting","tag-checklist","tag-complete","tag-return","tag-tax"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Do I need to complete a tax return? 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