{"id":2234,"date":"2026-04-27T17:34:15","date_gmt":"2026-04-27T17:34:15","guid":{"rendered":"https:\/\/kpd.be\/?p=2234"},"modified":"2026-05-03T10:50:59","modified_gmt":"2026-05-03T10:50:59","slug":"price-revision-indices","status":"publish","type":"post","link":"https:\/\/kpd.be\/nl\/price-revision-indices\/","title":{"rendered":"Tendering: Price revision indices"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"2234\" class=\"elementor elementor-2234\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fb38064 e-flex e-con-boxed e-con e-parent\" data-id=\"fb38064\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0263fc6 elementor-widget elementor-widget-text-editor\" data-id=\"0263fc6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The price list for building materials, the Mercuriale, is a well-known document in Belgium. The price list is considered a price monitoring system. Based on multiple categories of building materials, the price evolution is displayed using indices.<\/p><p>The index plays a very important role when making both an initial calculation and a recalculation. Particularly in public tenders, it is very common to invoke a price revision clause in construction contracts based on price developments.<\/p><p>As part of the reform process, Mercuriale introduced a new index in January 2021: &#8216;Index I 2021&#8217;. Index I 2021 is composed of 60 products and is grouped into 11 categories. The calculation of the \u201cupdated Index\u201d starts with the sales prices of November 2020, and therefore uses November 2020 = 100 as the base.<\/p><p>Contracting parties must rely on Index I 2021 when:<\/p><p>It concerns public tenders that started before 2023 and continue into 2023<br \/>The standard I-index of the materials was already applied<br \/>As of January 2023, a combined index of I and I-2021 is required to calculate the revision coefficient.<\/p><p>Specifications may provide for various types of price revision formulas. A commonly used formula is:<\/p><p>p = P * [ x 1 * (s \/ S) + x 2 * ( i \/ I ) + (1 \u2013 x 1 \u2013 x 2 ) ]<br \/>Where X 1 and X 2 correspond to the weighting coefficients (x1 for wages = values \u200b\u200bS) (x2 for materials) included in the specifications.<\/p><p>\u00ab p \u00bb = the revised price.<br \/>\u00ab P \u00bb = the original price.<br \/>\u00ab s \u00bb = the value of index S at the time of the revision.<br \/>\u00ab S \u00bb = the value of index S at the time of signing the contract.<br \/>\u00ab i \u00bb = the value of index I at the time of the revision.<br \/>\u00ab I \u00bb = the value of index I at the time of signing the contract.<\/p><p><strong>Want to know more about the application of Index I 2021 in the KPD ecosystem?<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>The price list for building materials, the Mercuriale, is a well-known document in Belgium. The price list is considered a price monitoring system. Based on multiple categories of building materials, the price evolution is displayed using indices. The index plays a very important role when making both an initial calculation and a recalculation. Particularly in [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1200,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[24],"tags":[51],"class_list":["post-2234","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-quick-tips","tag-tendering"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Tendering: Price revision indices - KPD<\/title>\n<meta name=\"description\" content=\"Efficiently calculate the costs of your construction projects using estimation software. Discover the most powerful estimation package on the market.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kpd.be\/nl\/price-revision-indices\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tendering: Price revision indices\" \/>\n<meta property=\"og:description\" content=\"Efficiently calculate the costs of your construction projects using estimation software. Discover the most powerful estimation package on the market.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kpd.be\/nl\/price-revision-indices\/\" \/>\n<meta property=\"og:site_name\" content=\"KPD\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-27T17:34:15+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-03T10:50:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kpd.be\/wp-content\/uploads\/2026\/04\/Webinar_Tendering_Pieter_Consultant.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"brango\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Geschreven door\" \/>\n\t<meta name=\"twitter:data1\" content=\"brango\" \/>\n\t<meta name=\"twitter:label2\" content=\"Geschatte leestijd\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/\"},\"author\":{\"name\":\"brango\",\"@id\":\"https:\\\/\\\/kpd.be\\\/#\\\/schema\\\/person\\\/9e40ada37b6008aae4664e7a61d46b71\"},\"headline\":\"Tendering: Price revision indices\",\"datePublished\":\"2026-04-27T17:34:15+00:00\",\"dateModified\":\"2026-05-03T10:50:59+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/\"},\"wordCount\":285,\"publisher\":{\"@id\":\"https:\\\/\\\/kpd.be\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/kpd.be\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/Webinar_Tendering_Pieter_Consultant.jpg\",\"keywords\":[\"TENDERING\"],\"articleSection\":[\"QUICK TIPS\"],\"inLanguage\":\"nl-NL\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/\",\"url\":\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/\",\"name\":\"Tendering: Price revision indices - KPD\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/kpd.be\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/kpd.be\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/Webinar_Tendering_Pieter_Consultant.jpg\",\"datePublished\":\"2026-04-27T17:34:15+00:00\",\"dateModified\":\"2026-05-03T10:50:59+00:00\",\"description\":\"Efficiently calculate the costs of your construction projects using estimation software. Discover the most powerful estimation package on the market.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/#breadcrumb\"},\"inLanguage\":\"nl-NL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"nl-NL\",\"@id\":\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/#primaryimage\",\"url\":\"https:\\\/\\\/kpd.be\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/Webinar_Tendering_Pieter_Consultant.jpg\",\"contentUrl\":\"https:\\\/\\\/kpd.be\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/Webinar_Tendering_Pieter_Consultant.jpg\",\"width\":1920,\"height\":1080},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/kpd.be\\\/price-revision-indices\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/kpd.be\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Tendering: Price revision indices\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/kpd.be\\\/#website\",\"url\":\"https:\\\/\\\/kpd.be\\\/\",\"name\":\"KPD\",\"description\":\"Construction software for ambitious construction companies.\",\"publisher\":{\"@id\":\"https:\\\/\\\/kpd.be\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/kpd.be\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"nl-NL\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/kpd.be\\\/#organization\",\"name\":\"KPD\",\"url\":\"https:\\\/\\\/kpd.be\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"nl-NL\",\"@id\":\"https:\\\/\\\/kpd.be\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/kpd.be\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/logo-kpd-standard_onlight.png\",\"contentUrl\":\"https:\\\/\\\/kpd.be\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/logo-kpd-standard_onlight.png\",\"width\":1242,\"height\":579,\"caption\":\"KPD\"},\"image\":{\"@id\":\"https:\\\/\\\/kpd.be\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/kpd.be\\\/#\\\/schema\\\/person\\\/9e40ada37b6008aae4664e7a61d46b71\",\"name\":\"brango\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"nl-NL\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/836f778736208328a5fb96befe1b93d0dae2b9bfd7f3204a056c1ded78749b7d?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/836f778736208328a5fb96befe1b93d0dae2b9bfd7f3204a056c1ded78749b7d?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/836f778736208328a5fb96befe1b93d0dae2b9bfd7f3204a056c1ded78749b7d?s=96&d=mm&r=g\",\"caption\":\"brango\"},\"sameAs\":[\"https:\\\/\\\/kpd.be\"],\"url\":\"https:\\\/\\\/kpd.be\\\/nl\\\/author\\\/brango\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Tendering: Price revision indices - KPD","description":"Bereken de kosten van uw bouwprojecten effici\u00ebnt met behulp van calculatiesoftware. Ontdek het krachtigste calculatiepakket op de markt.","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:\/\/kpd.be\/nl\/price-revision-indices\/","og_locale":"nl_NL","og_type":"article","og_title":"Tendering: Price revision indices","og_description":"Efficiently calculate the costs of your construction projects using estimation software. Discover the most powerful estimation package on the market.","og_url":"https:\/\/kpd.be\/nl\/price-revision-indices\/","og_site_name":"KPD","article_published_time":"2026-04-27T17:34:15+00:00","article_modified_time":"2026-05-03T10:50:59+00:00","og_image":[{"width":1920,"height":1080,"url":"https:\/\/kpd.be\/wp-content\/uploads\/2026\/04\/Webinar_Tendering_Pieter_Consultant.jpg","type":"image\/jpeg"}],"author":"brango","twitter_card":"summary_large_image","twitter_misc":{"Geschreven door":"brango","Geschatte leestijd":"2 minuten"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/kpd.be\/price-revision-indices\/#article","isPartOf":{"@id":"https:\/\/kpd.be\/price-revision-indices\/"},"author":{"name":"brango","@id":"https:\/\/kpd.be\/#\/schema\/person\/9e40ada37b6008aae4664e7a61d46b71"},"headline":"Tendering: Price revision indices","datePublished":"2026-04-27T17:34:15+00:00","dateModified":"2026-05-03T10:50:59+00:00","mainEntityOfPage":{"@id":"https:\/\/kpd.be\/price-revision-indices\/"},"wordCount":285,"publisher":{"@id":"https:\/\/kpd.be\/#organization"},"image":{"@id":"https:\/\/kpd.be\/price-revision-indices\/#primaryimage"},"thumbnailUrl":"https:\/\/kpd.be\/wp-content\/uploads\/2026\/04\/Webinar_Tendering_Pieter_Consultant.jpg","keywords":["TENDERING"],"articleSection":["QUICK TIPS"],"inLanguage":"nl-NL"},{"@type":"WebPage","@id":"https:\/\/kpd.be\/price-revision-indices\/","url":"https:\/\/kpd.be\/price-revision-indices\/","name":"Tendering: Price revision indices - KPD","isPartOf":{"@id":"https:\/\/kpd.be\/#website"},"primaryImageOfPage":{"@id":"https:\/\/kpd.be\/price-revision-indices\/#primaryimage"},"image":{"@id":"https:\/\/kpd.be\/price-revision-indices\/#primaryimage"},"thumbnailUrl":"https:\/\/kpd.be\/wp-content\/uploads\/2026\/04\/Webinar_Tendering_Pieter_Consultant.jpg","datePublished":"2026-04-27T17:34:15+00:00","dateModified":"2026-05-03T10:50:59+00:00","description":"Bereken de kosten van uw bouwprojecten effici\u00ebnt met behulp van calculatiesoftware. Ontdek het krachtigste calculatiepakket op de markt.","breadcrumb":{"@id":"https:\/\/kpd.be\/price-revision-indices\/#breadcrumb"},"inLanguage":"nl-NL","potentialAction":[{"@type":"ReadAction","target":["https:\/\/kpd.be\/price-revision-indices\/"]}]},{"@type":"ImageObject","inLanguage":"nl-NL","@id":"https:\/\/kpd.be\/price-revision-indices\/#primaryimage","url":"https:\/\/kpd.be\/wp-content\/uploads\/2026\/04\/Webinar_Tendering_Pieter_Consultant.jpg","contentUrl":"https:\/\/kpd.be\/wp-content\/uploads\/2026\/04\/Webinar_Tendering_Pieter_Consultant.jpg","width":1920,"height":1080},{"@type":"BreadcrumbList","@id":"https:\/\/kpd.be\/price-revision-indices\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/kpd.be\/"},{"@type":"ListItem","position":2,"name":"Tendering: Price revision indices"}]},{"@type":"WebSite","@id":"https:\/\/kpd.be\/#website","url":"https:\/\/kpd.be\/","name":"KPD","description":"Construction software for ambitious construction companies.","publisher":{"@id":"https:\/\/kpd.be\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/kpd.be\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"nl-NL"},{"@type":"Organization","@id":"https:\/\/kpd.be\/#organization","name":"KPD","url":"https:\/\/kpd.be\/","logo":{"@type":"ImageObject","inLanguage":"nl-NL","@id":"https:\/\/kpd.be\/#\/schema\/logo\/image\/","url":"https:\/\/kpd.be\/wp-content\/uploads\/2026\/04\/logo-kpd-standard_onlight.png","contentUrl":"https:\/\/kpd.be\/wp-content\/uploads\/2026\/04\/logo-kpd-standard_onlight.png","width":1242,"height":579,"caption":"KPD"},"image":{"@id":"https:\/\/kpd.be\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/kpd.be\/#\/schema\/person\/9e40ada37b6008aae4664e7a61d46b71","name":"brando","image":{"@type":"ImageObject","inLanguage":"nl-NL","@id":"https:\/\/secure.gravatar.com\/avatar\/836f778736208328a5fb96befe1b93d0dae2b9bfd7f3204a056c1ded78749b7d?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/836f778736208328a5fb96befe1b93d0dae2b9bfd7f3204a056c1ded78749b7d?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/836f778736208328a5fb96befe1b93d0dae2b9bfd7f3204a056c1ded78749b7d?s=96&d=mm&r=g","caption":"brango"},"sameAs":["https:\/\/kpd.be"],"url":"https:\/\/kpd.be\/nl\/author\/brango\/"}]}},"_links":{"self":[{"href":"https:\/\/kpd.be\/nl\/wp-json\/wp\/v2\/posts\/2234","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kpd.be\/nl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kpd.be\/nl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kpd.be\/nl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kpd.be\/nl\/wp-json\/wp\/v2\/comments?post=2234"}],"version-history":[{"count":11,"href":"https:\/\/kpd.be\/nl\/wp-json\/wp\/v2\/posts\/2234\/revisions"}],"predecessor-version":[{"id":2267,"href":"https:\/\/kpd.be\/nl\/wp-json\/wp\/v2\/posts\/2234\/revisions\/2267"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kpd.be\/nl\/wp-json\/wp\/v2\/media\/1200"}],"wp:attachment":[{"href":"https:\/\/kpd.be\/nl\/wp-json\/wp\/v2\/media?parent=2234"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kpd.be\/nl\/wp-json\/wp\/v2\/categories?post=2234"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kpd.be\/nl\/wp-json\/wp\/v2\/tags?post=2234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}