{"id":33915,"date":"2024-05-30T10:39:08","date_gmt":"2024-05-30T09:39:08","guid":{"rendered":"https:\/\/taxfix.com\/en-uk\/?p=33915"},"modified":"2025-06-04T11:39:50","modified_gmt":"2025-06-04T10:39:50","slug":"what-is-a-ct600","status":"publish","type":"post","link":"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/","title":{"rendered":"What is a CT600?"},"content":{"rendered":"\n<p>Navigating the maze that is business taxes can be overwhelming. Seriously, what is a CT600?<\/p>\n\n\n\n<p>With so many forms to keep track of, it&#8217;s so easy to get lost in the process. Luckily for you, Taxfix revels in all things tax and tax forms. We\u2019re here to simplify things for you.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">We\u2019ll ask again\u2026<\/h2>\n\n\n\n<p>So, what\u2019s a CT600 form? Put simply, it\u2019s the form that tells HMRC how much corporation tax your company owes. And it\u2019s just one of the documents that forms your annual company tax return.<\/p>\n\n\n\n<p>Let\u2019s take a closer look at who needs to submit a CT600 and how you can go about doing it correctly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Who needs to complete a CT600?<\/h2>\n\n\n\n<p>All companies registered in the UK with <a href=\"https:\/\/taxfix.com\/en-uk\/glossary\/companies-house\/\">Companies House<\/a> need to file a CT600 annually. Why? So that HMRC knows how much <a href=\"https:\/\/taxfix.com\/en-uk\/glossary\/company-tax\/\">corporation tax<\/a> you\u2019ll need to pay on your profits.&nbsp;<\/p>\n\n\n\n<p>This includes limited companies, public limited companies (PLCs), and certain clubs, societies and associations that are liable for corporation tax.&nbsp;<\/p>\n\n\n\n<p>Essentially, if your company is subject to corporation tax, you\u2019ll need to complete and submit a CT600 form each year.<\/p>\n\n\n<\/div> <!-- .c-body -->\n\n<div class=\"b-cta-mini m-purple m-align-left\">\n    \n    <div class=\"b-cta-mini__content\">\n\n        \n        <h2 class=\"b-cta-mini__title\">Not sure whether you need to or not?<\/h2>\n\n        \n        \n        <div class=\"b-cta-mini__body\">\n            <div class=\"b-block-body\"><p><!-- wp:paragraph --><\/p>\n<p>No worries, get tax advice from a professional accredited accountant about your situation. They\u2019ll help you with all things company tax. 30 minutes, 1-1, 100% remote.<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/div>\n        <\/div>\n\n        \n        \n        <div class=\"b-cta-mini__action\">\n\n            <a data-js=\"openAuth\" data-location=\"\" data-view=\"signup\" href=\"https:\/\/taxfix.com\/en-uk\/assessment\/signup\" class=\"gtm-get-started-button c-button  m-large\" onClick=\"javascript:setVariant('taxConsultation');\">Book now<\/a>\n\n\n        <\/div>\n\n        \n    <\/div>\n<\/div> <!-- .b-cta-mini -->\n\n<div class=\"c-body\">\n\n\n\n\n<h2 class=\"wp-block-heading\">When do I need to submit it by?<\/h2>\n\n\n\n<p>This is where things can get a little more complicated, so let\u2019s break it down.<\/p>\n\n\n\n<p>Every company has its own CT600 form deadline. Since the CT600 forms part of your company tax return, your CT600 is essentially due on the same date as your <a href=\"https:\/\/taxfix.com\/en-uk\/limited-company-tax-service\/\">company tax return<\/a>.<\/p>\n\n\n\n<p>This will coincide with the end of your <a href=\"https:\/\/www.gov.uk\/corporation-tax-accounting-period\" target=\"_blank\" rel=\"noreferrer noopener\">accounting period<\/a>.&nbsp;<\/p>\n\n\n\n<p>For example, if your financial year ends on 31 March, that\u2019s the end of your accounting period. You\u2019ll need to submit you company tax return (including the CT600) within 12 months of this date.<\/p>\n\n\n\n<p>You can learn more about the <a href=\"https:\/\/taxfix.com\/en-uk\/limited-companies\/when-is-corporation-tax-due\/\">corporation tax due date here<\/a>. Use our guide as a calculator to find out when your corporation tax and company tax return are due.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is there a penalty if I file my CT600 late?<\/h3>\n\n\n\n<p>Since the CT600 forms part of your company tax return, you&#8217;ll face the same late filing penalties as you would for your tax return. And this can come with some pretty hefty fees \ud83d\ude30.<\/p>\n\n\n\n<p>If you&#8217;re even just 1 day late with your company tax return, you&#8217;ll get hit with a \u00a3100 penalty. Let that slide for another 3 months and you\u2019ll be charged an extra \u00a3100 on top.&nbsp;<\/p>\n\n\n\n<p>If you still don\u2019t file 6 months down the line, HMRC starts estimating your tax bill and adds a penalty of 10%.<\/p>\n\n\n\n<p>Let\u2019s imagine 12 months have passed. Guess what? Another 10% penalty is added. So, to avoid these headaches, make sure you get your CT600 in on time!<\/p>\n\n\n<\/div> <!-- .c-body -->\n\n<div class=\"b-cta-mini m-blue m-align-left\">\n    \n    <div class=\"b-cta-mini__content\">\n\n        \n        <h2 class=\"b-cta-mini__title\">Avoid penalties with professional help<\/h2>\n\n        \n        \n        <div class=\"b-cta-mini__body\">\n            <div class=\"b-block-body\"><p><!-- wp:paragraph --><\/p>\n<p>Get your company taxes sorted by an accredited accountant for a one-off, fixed fee. 100% online, 0% fuss.<\/p>\n<p><!-- \/wp:paragraph --><\/p>\n<\/div>\n        <\/div>\n\n        \n        \n        <div class=\"b-cta-mini__action\">\n\n            <a href=\"https:\/\/taxfix.com\/en-uk\/assessment\/companyReturn\" class=\"c-button m-large  m-mobile-fullwidth\">Learn more<\/a>\n\n\n        <\/div>\n\n        \n    <\/div>\n<\/div> <!-- .b-cta-mini -->\n\n<div class=\"c-body\">\n\n\n\n\n<h2 class=\"wp-block-heading\">What&#8217;s the difference between a CT600 and a CT603<\/h2>\n\n\n\n<p>It\u2019s pretty easy to get the CT600 and CT603 mixed up \u2013 they are similar numbers after all! But they both serve different purposes when it comes to your company tax return.<\/p>\n\n\n\n<p>The CT603 is simply a notice from HMRC to request the filing of your CT600 (corporation tax for your company tax return).<\/p>\n\n\n\n<p>It\u2019s HMRC\u2019s way of saying: &#8220;It&#8217;s time to get your tax affairs in order.&#8221; So, when you receive a CT603 notice, it\u2019s time to prepare your CT600 form for submission.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to submit Corporation Tax for Company Tax Return<\/h2>\n\n\n\n<p>Looking for a helping hand to submit your CT600 form? Follow these simple steps.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Step 1: Gather your financial information. Before you start filling out the CT600 form, you\u2019ll need to make sure you have the following to hand:<br>\n<ul class=\"wp-block-list\">\n<li>Income statements<\/li>\n\n\n\n<li><a href=\"https:\/\/taxfix.com\/en-uk\/self-employed-tax-returns\/bookkeeping\/how-to-read-a-balance-sheet\/\">Balance sheets<\/a><\/li>\n\n\n\n<li>Records of <a href=\"https:\/\/taxfix.com\/en-uk\/glossary\/expenses\/\">expenses<\/a><\/li>\n\n\n\n<li>Details of any allowances and reliefs<\/li>\n\n\n\n<li>Previous company tax returns (if applicable)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Step 2: Access the CT600 form. Visit the <a href=\"https:\/\/www.gov.uk\/government\/publications\/corporation-tax-company-tax-return-ct600-2015-version-3\" target=\"_blank\" rel=\"noreferrer noopener\">HMRC website<\/a> or use compatible accounting software.<br><\/li>\n\n\n\n<li>Step 3: Complete the form. We recommend you have an accountant do this for you. Let an accredited accountant sort it all for you, for less. <a href=\"https:\/\/taxfix.com\/en-uk\/limited-company-tax-service\/?_gl=1*wwmbgk*_up*MQ..&amp;gclid=CjwKCAjwr7ayBhAPEiwA6EIGxEr9uXpFnDrSt0PL63msf7XvTPCWf17XyhQT10m5bM_uKgv7yOzFjBoCOO4QAvD_BwE\">Get started here<\/a>.<br><\/li>\n\n\n\n<li>Step 4: Review and submit. Check all of the information is correct before submitting. You don\u2019t want to underpay corporation tax as HMRC will charge you interest.<br><\/li>\n\n\n\n<li>Step 5: Pay your corporation tax. Your bill will be due in full or in installments and you can <a href=\"https:\/\/www.gov.uk\/pay-corporation-tax\" target=\"_blank\" rel=\"noreferrer noopener\">pay it online<\/a>.<\/li>\n<\/ul>\n\n\n\n<p>You can learn more about <a href=\"https:\/\/taxfix.com\/en-uk\/limited-companies\/pay-corporation-tax\/\">how to pay corporation tax here<\/a>.<\/p>\n\n\n\n<p>Or, of course, you can always just use Taxfix.<\/p>\n\n\n<\/div> <!-- .c-body -->\n\n<div class=\"b-cta-mini m-yellow m-align-left\">\n    \n    <div class=\"b-cta-mini__content\">\n\n        \n        <h2 class=\"b-cta-mini__title\">How can Taxfix help?<\/h2>\n\n        \n        \n        <div class=\"b-cta-mini__body\">\n            <div class=\"b-block-body\"><p>Let us sort your year-end accounts and <a href=\"https:\/\/taxfix.com\/en-uk\/limited-company-tax-service\/\">corporate tax return<\/a> without the stress. Our accredited accountants can take care of the CT600 form (and your year-end accounts) for you for a one-off, affordable price.<\/p>\n<\/div>\n        <\/div>\n\n        \n        \n        <div class=\"b-cta-mini__action\">\n\n            <a href=\"https:\/\/taxfix.com\/en-uk\/assessment\/companyReturn\" class=\"c-button m-large  m-mobile-fullwidth\">Get Started<\/a>\n\n\n        <\/div>\n\n        \n    <\/div>\n<\/div> <!-- .b-cta-mini -->\n\n<div class=\"c-body\">\n\n","protected":false},"excerpt":{"rendered":"<p>Navigating the maze that is business taxes can be overwhelming. Seriously, what is a CT600? With so many forms to keep track of, it&#8217;s so easy to get lost in the process. Luckily for you, Taxfix revels in all things tax and tax forms. We\u2019re here to simplify things for you. We\u2019ll ask again\u2026 So, [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[503],"tags":[505,504,102,502],"class_list":["post-33915","post","type-post","status-publish","format-standard","hentry","category-limited-companies","tag-companies-house","tag-corporation-tax","tag-hmrc","tag-limited-company"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is a CT600? &#8211; Taxfix<\/title>\n<meta name=\"description\" content=\"What is a CT600 and when do I need to file it by? We&#039;ve got all the answers to your questions. Let&#039;s dive into the word of company taxes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is a CT600? &#8211; Taxfix\" \/>\n<meta property=\"og:description\" content=\"What is a CT600 and when do I need to file it by? We&#039;ve got all the answers to your questions. Let&#039;s dive into the word of company taxes.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/\" \/>\n<meta property=\"og:site_name\" content=\"Taxfix\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/taxfix_uk\" \/>\n<meta property=\"article:published_time\" content=\"2024-05-30T09:39:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-04T10:39:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/taxfix.com\/en-uk\/wp-content\/uploads\/eyJhc3NldF9pZCI6NTY3OH0_taxfix-gmbh_UwIjumOzeyPqNyDgJ1bVY_OROVADgg2mBtzSX1XQ7A0.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"628\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Roshni Karadia\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@Taxfix\" \/>\n<meta name=\"twitter:site\" content=\"@Taxfix\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/\",\"url\":\"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/\",\"name\":\"What is a CT600? &#8211; Taxfix\",\"isPartOf\":{\"@id\":\"https:\/\/taxfix.com\/en-uk\/#website\"},\"datePublished\":\"2024-05-30T09:39:08+00:00\",\"dateModified\":\"2025-06-04T10:39:50+00:00\",\"author\":{\"@id\":\"https:\/\/taxfix.com\/en-uk\/#\/schema\/person\/09c064e5a4b2a42a4ea0872f615a8350\"},\"description\":\"What is a CT600 and when do I need to file it by? We've got all the answers to your questions. Let's dive into the word of company taxes.\",\"breadcrumb\":{\"@id\":\"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/taxfix.com\/en-uk\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"What is a CT600?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/taxfix.com\/en-uk\/#website\",\"url\":\"https:\/\/taxfix.com\/en-uk\/\",\"name\":\"Taxfix\",\"description\":\"Taxes as they should be done\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/taxfix.com\/en-uk\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/taxfix.com\/en-uk\/#\/schema\/person\/09c064e5a4b2a42a4ea0872f615a8350\",\"name\":\"Roshni Karadia\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\/\/taxfix.com\/en-uk\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/c81559830744db9ee36c29aaa7045429bc3744fe476f9948b56e01ebb822f9e3?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/c81559830744db9ee36c29aaa7045429bc3744fe476f9948b56e01ebb822f9e3?s=96&d=mm&r=g\",\"caption\":\"Roshni Karadia\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What is a CT600? &#8211; Taxfix","description":"What is a CT600 and when do I need to file it by? We've got all the answers to your questions. Let's dive into the word of company taxes.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/","og_locale":"en_GB","og_type":"article","og_title":"What is a CT600? &#8211; Taxfix","og_description":"What is a CT600 and when do I need to file it by? We've got all the answers to your questions. Let's dive into the word of company taxes.","og_url":"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/","og_site_name":"Taxfix","article_publisher":"https:\/\/www.facebook.com\/taxfix_uk","article_published_time":"2024-05-30T09:39:08+00:00","article_modified_time":"2025-06-04T10:39:50+00:00","og_image":[{"width":1200,"height":628,"url":"https:\/\/taxfix.com\/en-uk\/wp-content\/uploads\/eyJhc3NldF9pZCI6NTY3OH0_taxfix-gmbh_UwIjumOzeyPqNyDgJ1bVY_OROVADgg2mBtzSX1XQ7A0.jpg","type":"image\/jpeg"}],"author":"Roshni Karadia","twitter_card":"summary_large_image","twitter_creator":"@Taxfix","twitter_site":"@Taxfix","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/","url":"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/","name":"What is a CT600? &#8211; Taxfix","isPartOf":{"@id":"https:\/\/taxfix.com\/en-uk\/#website"},"datePublished":"2024-05-30T09:39:08+00:00","dateModified":"2025-06-04T10:39:50+00:00","author":{"@id":"https:\/\/taxfix.com\/en-uk\/#\/schema\/person\/09c064e5a4b2a42a4ea0872f615a8350"},"description":"What is a CT600 and when do I need to file it by? We've got all the answers to your questions. Let's dive into the word of company taxes.","breadcrumb":{"@id":"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/taxfix.com\/en-uk\/limited-companies\/what-is-a-ct600\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/taxfix.com\/en-uk\/"},{"@type":"ListItem","position":2,"name":"What is a CT600?"}]},{"@type":"WebSite","@id":"https:\/\/taxfix.com\/en-uk\/#website","url":"https:\/\/taxfix.com\/en-uk\/","name":"Taxfix","description":"Taxes as they should be done","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/taxfix.com\/en-uk\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-GB"},{"@type":"Person","@id":"https:\/\/taxfix.com\/en-uk\/#\/schema\/person\/09c064e5a4b2a42a4ea0872f615a8350","name":"Roshni Karadia","image":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/taxfix.com\/en-uk\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/c81559830744db9ee36c29aaa7045429bc3744fe476f9948b56e01ebb822f9e3?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/c81559830744db9ee36c29aaa7045429bc3744fe476f9948b56e01ebb822f9e3?s=96&d=mm&r=g","caption":"Roshni Karadia"}}]}},"_links":{"self":[{"href":"https:\/\/taxfix.com\/en-uk\/wp-json\/wp\/v2\/posts\/33915","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/taxfix.com\/en-uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/taxfix.com\/en-uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/taxfix.com\/en-uk\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/taxfix.com\/en-uk\/wp-json\/wp\/v2\/comments?post=33915"}],"version-history":[{"count":10,"href":"https:\/\/taxfix.com\/en-uk\/wp-json\/wp\/v2\/posts\/33915\/revisions"}],"predecessor-version":[{"id":39953,"href":"https:\/\/taxfix.com\/en-uk\/wp-json\/wp\/v2\/posts\/33915\/revisions\/39953"}],"wp:attachment":[{"href":"https:\/\/taxfix.com\/en-uk\/wp-json\/wp\/v2\/media?parent=33915"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/taxfix.com\/en-uk\/wp-json\/wp\/v2\/categories?post=33915"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/taxfix.com\/en-uk\/wp-json\/wp\/v2\/tags?post=33915"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}