{"id":4872,"date":"2026-04-30T15:52:28","date_gmt":"2026-04-30T15:52:28","guid":{"rendered":"https:\/\/www.nominaurea.pt\/?p=4872"},"modified":"2026-04-30T16:00:25","modified_gmt":"2026-04-30T16:00:25","slug":"non-marital-partnership-income-tax-portugal","status":"publish","type":"post","link":"https:\/\/www.nominaurea.pt\/en\/noticias\/non-marital-partnership-income-tax-portugal\/","title":{"rendered":"Non-marital partnership and Income Tax in Portugal: what is the best option on Form 3?"},"content":{"rendered":"<h2><strong>Legal framework of non-marital partnership in Portugal<\/strong><\/h2>\n<p><strong>Non-marital partnership<\/strong> is recognised when two people live together for more than two years under conditions like those of a married couple.<\/p>\n<p>For Income Tax purposes, the law treats de non-marital partnership the same as married couples, provided certain requirements are met\u2014namely having a shared tax residence during that period.<\/p>\n<p>This means that when submitting Form 3, de <strong>non-marital partnership<\/strong> have the same options as married couples.<\/p>\n<h2><strong>Joint taxation vs. separate taxation<\/strong><\/h2>\n<ol>\n<li><strong> Joint taxation<\/strong><\/li>\n<\/ol>\n<ul>\n<li>The couple submits a single Income Tax return;<\/li>\n<li>Income is combined and divided by two (income splitting mechanism);<\/li>\n<li>It may reduce the effective tax rate, particularly when there is a significant difference in income between partners.<\/li>\n<\/ul>\n<p>\ud83d\udc49 This option is generally more advantageous when:<\/p>\n<ul>\n<li>One partner earns significantly less;<\/li>\n<li>Only one partner has income.<\/li>\n<\/ul>\n<ol start=\"2\">\n<li><strong> Separate taxation<\/strong><\/li>\n<\/ol>\n<ul>\n<li>Each partner submits their own tax return;<\/li>\n<li>Dependants\u2019 income is split equally (50% each);<\/li>\n<li>Tax deductions are also divided.<\/li>\n<\/ul>\n<p>\ud83d\udc49 This option may be more beneficial when:<\/p>\n<ul>\n<li>Both partners have similar income levels;<\/li>\n<li>There are significant individual deductible expenses;<\/li>\n<li>The household is already in higher tax brackets.<\/li>\n<\/ul>\n<h2><strong>What is the best option?<\/strong><\/h2>\n<p>The answer is simple, yet often overlooked:<br \/>\n\ud83d\udc49 it depends on the specific case.<\/p>\n<p>The Portuguese tax system itself encourages simulation of both scenarios because:<\/p>\n<ul>\n<li>Income splitting may reduce overall tax;<\/li>\n<li>But dividing deductions can sometimes reduce tax benefits.<\/li>\n<\/ul>\n<p>According to various tax analyses, there is no universal rule \u2014 the same couple may benefit from different options in different years depending on:<\/p>\n<ul>\n<li>Changes in income;<\/li>\n<li>The birth of children;<\/li>\n<li>Health, education, or housing expenses;<\/li>\n<li>Applicable tax benefits (e.g. IRS Jovem).<\/li>\n<\/ul>\n<h2><strong>Key factors to consider before choosing<\/strong><\/h2>\n<p>Before submitting Form 3, you should review:<\/p>\n<ul>\n<li>\u2714\ufe0f Income differences between partners<\/li>\n<li>\u2714\ufe0f Number of dependants<\/li>\n<li>\u2714\ufe0f Total tax deductions<\/li>\n<li>\u2714\ufe0f Applicable tax benefits<\/li>\n<li>\u2714\ufe0f Simulations on the Tax Authority portal (joint vs. separate)<\/li>\n<\/ul>\n<p>\u26a0\ufe0f Important: the choice is made annually, meaning it can be adjusted each year to maximise tax efficiency.<\/p>\n<h2><strong>Common mistakes to avoid<\/strong><\/h2>\n<ul>\n<li>Assuming that joint taxation is always more beneficial<\/li>\n<li>Failing to simulate both scenarios before submission<\/li>\n<li>Incorrectly declaring the household composition<\/li>\n<li>Ignoring the impact of deductions and tax benefits<\/li>\n<\/ul>\n<h2><strong>Conclusion<\/strong><\/h2>\n<p>Choosing between joint and separate taxation for <strong>Non-marital partnership<\/strong> in Portugal should not be based on intuition, but on concrete simulations and technical analysis.<\/p>\n<p>In many cases, small differences in income or expenses can result in hundreds or even thousands of pounds (or euros) difference in the final tax bill.<\/p>\n<p>\ud83d\udc49 The right decision is simply the one that legally minimises your tax.<\/p>\n<h2><strong>How <a href=\"https:\/\/www.nominaurea.pt\/en\/\">Nominaurea<\/a> can help<\/strong><\/h2>\n<p>At <a href=\"https:\/\/www.nominaurea.pt\/en\/\">Nominaurea<\/a>, we analyse each tax situation in detail to ensure you choose the most advantageous option.<\/p>\n<p>\u2714\ufe0f Professional tax simulations (joint vs. separate)<br \/>\n\u2714\ufe0f Household tax optimisation<br \/>\n\u2714\ufe0f Full support with Form 3 submission<br \/>\n\u2714\ufe0f Tax planning for future years<\/p>\n<p>Avoid paying more tax than necessary \u2014 get in touch with us.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Legal framework of non-marital partnership in Portugal Non-marital partnership is recognised when two people live together for more than two years under conditions like those of a married couple. For Income Tax purposes, the law treats de non-marital partnership the same as married couples, provided certain requirements are met\u2014namely having a shared tax residence during [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":4860,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4872","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-publications"],"_links":{"self":[{"href":"https:\/\/www.nominaurea.pt\/en\/wp-json\/wp\/v2\/posts\/4872","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nominaurea.pt\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nominaurea.pt\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nominaurea.pt\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nominaurea.pt\/en\/wp-json\/wp\/v2\/comments?post=4872"}],"version-history":[{"count":1,"href":"https:\/\/www.nominaurea.pt\/en\/wp-json\/wp\/v2\/posts\/4872\/revisions"}],"predecessor-version":[{"id":4873,"href":"https:\/\/www.nominaurea.pt\/en\/wp-json\/wp\/v2\/posts\/4872\/revisions\/4873"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nominaurea.pt\/en\/wp-json\/wp\/v2\/media\/4860"}],"wp:attachment":[{"href":"https:\/\/www.nominaurea.pt\/en\/wp-json\/wp\/v2\/media?parent=4872"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nominaurea.pt\/en\/wp-json\/wp\/v2\/categories?post=4872"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nominaurea.pt\/en\/wp-json\/wp\/v2\/tags?post=4872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}