{"id":62945,"date":"2025-08-15T08:00:00","date_gmt":"2025-08-15T13:00:00","guid":{"rendered":"https:\/\/taxprocenter.proconnect.intuit.com\/?p=62945"},"modified":"2025-09-08T10:53:53","modified_gmt":"2025-09-08T15:53:53","slug":"september-2025-tax-and-compliance-deadlines","status":"publish","type":"post","link":"https:\/\/accountants.intuit.com\/taxprocenter\/tax-law-and-news\/september-2025-tax-and-compliance-deadlines\/","title":{"rendered":"September 2025 tax and compliance deadlines"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">What&#8217;s up in September? For many tax pros, you&#8217;ll get back to business after a busy summer with family and friends. For others, important extension filings are just around the corner and you&#8217;re getting ready for those. Along the way, check out these important tax and compliance deadlines for September 2025, and be sure to share this list with your clients.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In <a href=\"https:\/\/taxprocenter.proconnect.intuit.com\/wp-content\/uploads\/2025\/08\/September-2025-tax-and-compliance-deadlines.pdf\">September<\/a>, it is recommended that you:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Finalize extended returns:<\/strong> Complete <a href=\"https:\/\/taxprocenter.proconnect.intuit.com\/practice-management\/grow-your-practice\/extended-s-corp-returns-new-revenue-and-client-opps\/\">S Corporation<\/a> and partnership returns before the September 15 deadline<\/li>\n\n\n\n<li><strong>Confirm estimated tax payments: <\/strong>Notify clients about the 3rd estimated tax payment and confirm submission.&nbsp;<\/li>\n\n\n\n<li><strong>Conduct year-end tax planning:<\/strong> Identify <a href=\"https:\/\/taxprocenter.proconnect.intuit.com\/tag\/tax-advisory\/\">tax-saving strategies<\/a> for high-net-worth individuals and business clients.&nbsp;<\/li>\n\n\n\n<li><strong>Join a new professional group or mastermind: <\/strong>Find a group that focuses on tax strategy, business growth, or even something unrelated to tax.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-x-large-font-size wp-block-paragraph\"><strong>Key Compliance Dates<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Wednesday, September 10<\/strong>\u2014Tips reporting for August.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Friday, September 12<\/strong>\u2014Regular method excise taxes deposit for the last 16 days of August.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Monday, September 15:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>3rd installment of 2025 estimated tax (individuals and corporations).<\/li>\n\n\n\n<li>S Corporation (<a href=\"https:\/\/www.irs.gov\/pub\/irs-pdf\/f1120s.pdf\" target=\"_blank\">1120-S<\/a>) and Partnership (<a href=\"https:\/\/www.irs.gov\/pub\/irs-pdf\/f1065.pdf\" target=\"_blank\">1065<\/a>) returns due (if extended).<\/li>\n\n\n\n<li>Monthly payroll tax deposit for August (<a href=\"https:\/\/www.irs.gov\/pub\/irs-pdf\/f941.pdf\" target=\"_blank\">Form 941<\/a>).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Thursday, September 25<\/strong>\u2014Communications and air transportation taxes deposit for the last 16 days of August.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Monday, September 29<\/strong>\u2014 Regular method excise taxes deposit for the first 15 days of September.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Tuesday, September 30:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wagering tax (<a href=\"https:\/\/www.irs.gov\/pub\/irs-pdf\/f730.pdf\" target=\"_blank\">Form 730<\/a>) and Heavy Highway Vehicle Use Tax (<a href=\"https:\/\/www.irs.gov\/pub\/irs-pdf\/f2290.pdf\" target=\"_blank\">Form 2290<\/a>) for August due.&nbsp;<\/li>\n\n\n\n<li>Final due date for special September deposit rules (excise tax).<\/li>\n<\/ul>\n\n\n\n<p class=\"has-x-large-font-size wp-block-paragraph\"><strong>Intuit\u00ae Accountant Resources<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <a href=\"https:\/\/taxprocenter.proconnect.intuit.com\/wp-content\/uploads\/2025\/08\/September-2025-tax-and-compliance-deadlines.pdf\">September 2025 calendar<\/a> with filing deadlines and reminders for you and your clients.<\/li>\n\n\n\n<li><a href=\"https:\/\/taxprocenter.proconnect.intuit.com\/tax-law-and-news\/one-big-beautiful-bill-summary-and-tax-changes\/\">One Big Beautiful Bill summary and tax changes<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/taxprocenter.proconnect.intuit.com\/tax-law-and-news\/navigating-the-new-tax-landscape\/\">Navigating the tax landscape<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/accountants.intuit.com\/tax-software\/tax-online\/pro-tax-planning-guide\/?s_cid=PA_PTO_TaxCenter_taxguide23\">Intuit Tax Guide 2024<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/taxprocenter.proconnect.intuit.com\/tax-law-and-news\/annual-inflation-adjustments-for-ty24-and-ty25\/\">IRS annual inflation adjustments for tax years 2024 and 2025<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/taxprocenter.proconnect.intuit.com\/wp-content\/uploads\/2024\/05\/Key-Tax-Facts-for-2024.pdf\">Key Tax Facts for 2024<\/a> and <a href=\"https:\/\/taxprocenter.proconnect.intuit.com\/wp-content\/uploads\/2025\/05\/Key-tax-facts-for-2025.pdf\">Key Tax Facts for 2025<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>What&#8217;s up in September? For many tax pros, you&#8217;ll get back to business after a busy summer with family and friends. For others, important extension filings are just around the corner and you&#8217;re getting ready for those. Along the way, check out these important tax and compliance deadlines for September 2025, and be sure to<\/p>\n","protected":false},"author":144648942,"featured_media":62952,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rkv_reviewed_by_select":[],"rkv_browse_by_id":0,"rkv_cta_id":0,"rkv_optimize_for_pagespeed":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"useModifiedDate":false,"customPublishDate":"","customModifiedDate":"","_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"{title}\n\n{excerpt}\n\n{url}","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_wpas_customize_per_network":false,"jetpack_post_was_ever_published":false},"categories":[509474089],"tags":[36965590],"intuit_collection":[],"intuit_series":[],"coauthors":[646041721],"class_list":["post-62945","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tax-law-and-news","tag-monthly-deadlines"],"header_image":"","yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.4 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>September 2025 Tax Deadlines<\/title>\n<meta name=\"description\" content=\"September 2025 deadlines: S corp and partnership extensions due Sept. 15, Q3 estimated tax payments, Sept. 10 tips reporting, and Sept. 12 excise tax compliance dates.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/accountants.intuit.com\/taxprocenter\/tax-law-and-news\/september-2025-tax-and-compliance-deadlines\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"September 2025 tax and compliance deadlines - Tax Pro Center | Intuit\" \/>\n<meta property=\"og:description\" content=\"September 2025 deadlines: S corp and partnership extensions due Sept. 15, Q3 estimated tax payments, Sept. 10 tips reporting, and Sept. 12 excise tax compliance dates.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/accountants.intuit.com\/taxprocenter\/tax-law-and-news\/september-2025-tax-and-compliance-deadlines\/\" \/>\n<meta property=\"og:site_name\" content=\"Tax Pro Center | Intuit\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/IntuitAccountants\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-15T13:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-09-08T15:53:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/taxprocenter.proconnect.intuit.com\/wp-content\/uploads\/2025\/08\/September-2025-tax-and-compliance-deadlines-copy.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1440\" \/>\n\t<meta property=\"og:image:height\" content=\"587\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Christopher J. 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