diff --git a/addons/l10n_fi/data/account_tax_report_line.xml b/addons/l10n_fi/data/account_tax_report_line.xml
index 051c8b3bfcc9ab..ec1aa80d758812 100644
--- a/addons/l10n_fi/data/account_tax_report_line.xml
+++ b/addons/l10n_fi/data/account_tax_report_line.xml
@@ -19,7 +19,8 @@
                 <field name="name">Tax on domestic sales by tax rates</field>
                 <field name="name@fi">Vero kotimaan myynneistä verokannoittain</field>
                 <!-- "sale_25_5_and_24" refers to both 24% and 25.5% taxes. Will only be 25.5 on 01/01/2025.-->
-                <field name="aggregation_formula">sale_25_5_and_24.balance + sale_14.balance + sale_10.balance</field>
+                <!-- "sale_14_and_13_5" refers to both 14% and 13.5% taxes -->
+                <field name="aggregation_formula">sale_25_5_and_24.balance + sale_14_and_13_5.balance + sale_10.balance</field>
                 <field name="code">domestic_sales</field>
                 <field name="children_ids">
                     <record id="tax_report_sales_25_5_and_24" model="account.report.line">
@@ -55,15 +56,36 @@
                             </record>
                         </field>
                     </record>
-                    <record id="tax_report_sales_14" model="account.report.line">
-                        <field name="name">14% tax</field>
-                        <field name="name@fi">14 %:n vero</field>
-                        <field name="code">sale_14</field>
-                        <field name="expression_ids">
-                            <record id="tax_report_sales_14_tag" model="account.report.expression">
-                                <field name="label">balance</field>
-                                <field name="engine">tax_tags</field>
-                                <field name="formula">-fi_302</field>
+                    <record id="tax_report_sales_14_and_13_5" model="account.report.line">
+                        <field name="name">14% tax + 13.5% tax</field>
+                        <field name="name@fi">14 %:n vero + 13.5 %:n vero</field>
+                        <field name="code">sale_14_and_13_5</field>
+                        <field name="foldable">True</field>
+                        <field name="aggregation_formula">sale_14.balance + sale_13_5.balance</field>
+                        <field name="children_ids">
+                            <record id="tax_report_sales_14" model="account.report.line">
+                                <field name="name">14% tax</field>
+                                <field name="name@fi">14 %:n vero</field>
+                                <field name="code">sale_14</field>
+                                <field name="expression_ids">
+                                    <record id="tax_report_sales_14_tag" model="account.report.expression">
+                                        <field name="label">balance</field>
+                                        <field name="engine">tax_tags</field>
+                                        <field name="formula">-fi_302</field>
+                                    </record>
+                                </field>
+                            </record>
+                            <record id="tax_report_sales_13_5" model="account.report.line">
+                                <field name="name">13.5% tax</field>
+                                <field name="name@fi">13.5 %:n vero</field>
+                                <field name="code">sale_13_5</field>
+                                <field name="expression_ids">
+                                    <record id="tax_report_sales_13_5_tag" model="account.report.expression">
+                                        <field name="label">balance</field>
+                                        <field name="engine">tax_tags</field>
+                                        <field name="formula">-fi_321</field>
+                                    </record>
+                                </field>
                             </record>
                         </field>
                     </record>
@@ -158,7 +180,8 @@
                 <field name="name@fi">Maksettava vero / Palautukseen oikeuttava vero (-)</field>
                 <field name="code">payable_refundable_tax</field>
                 <!-- "sale_25_5_and_24" refers to both 24% and 25.5% taxes. Will only be 25.5 on 01/01/2025.-->
-                <field name="aggregation_formula">sale_25_5_and_24.balance + sale_14.balance + sale_10.balance + goods_eu.balance + service_eu.balance + goods_no_eu.balance + construct.balance - deductible.balance</field>
+                <!-- "sale_14_and_13_5" refers to both 14% and 13.5% taxes -->
+                <field name="aggregation_formula">sale_25_5_and_24.balance + sale_14_and_13_5.balance + sale_10.balance + goods_eu.balance + service_eu.balance + goods_no_eu.balance + construct.balance - deductible.balance</field>
             </record>
             <record id="tax_report_base_turnover_0_vat" model="account.report.line">
                 <field name="name">0-Turnover subject to zero tax rate</field>
diff --git a/addons/l10n_fi/data/template/account.tax-fi.csv b/addons/l10n_fi/data/template/account.tax-fi.csv
index 0401e2ed6aaf26..8cbfd44a17ec14 100644
--- a/addons/l10n_fi/data/template/account.tax-fi.csv
+++ b/addons/l10n_fi/data/template/account.tax-fi.csv
@@ -11,6 +11,10 @@
 "","","","","","","","","","","tax","invoice","account_2930","fi_302","","","","","",""
 "","","","","","","","","","","base","refund","","","","","","","",""
 "","","","","","","","","","","tax","refund","account_2930","fi_302","","","","","",""
+"tax_dom_sales_goods_13_5","13.5%","","13.5%","13.5","tax_group_13_5","sale","percent","","","base","invoice","","","","","13.5%","eu_no_vat,finland","",""
+"","","","","","","","","","","tax","invoice","account_2930","fi_321","","","","","",""
+"","","","","","","","","","","base","refund","","","","","","","",""
+"","","","","","","","","","","tax","refund","account_2930","fi_321","","","","","",""
 "tax_dom_sales_goods_10","10%","","10%","10.0","tax_group_10","sale","percent","False","","base","invoice","","","","","10%","eu_no_vat,finland","",""
 "","","","","","","","","","","tax","invoice","account_2930","fi_303","","","","","",""
 "","","","","","","","","","","base","refund","","","","","","","",""
@@ -31,6 +35,10 @@
 "","","","","","","","","","","tax","invoice","account_2930","fi_302","","","","","",""
 "","","","","","","","","","","base","refund","","","","","","","",""
 "","","","","","","","","","","tax","refund","account_2930","fi_302","","","","","",""
+"tax_dom_sales_service_13_5","13.5% S","13.5% services","13.5%","13.5","tax_group_13_5","sale","percent","","","base","invoice","","","","13.5% palvelua","13.5%","eu_no_vat,finland","",""
+"","","","","","","","","","","tax","invoice","account_2930","fi_321","","","","","",""
+"","","","","","","","","","","base","refund","","","","","","","",""
+"","","","","","","","","","","tax","refund","account_2930","fi_321","","","","","",""
 "tax_dom_sales_service_10","10% S","10% services","10%","10.0","tax_group_10","sale","percent","False","","base","invoice","","","","10% palvelua","10%","eu_no_vat,finland","",""
 "","","","","","","","","","","tax","invoice","account_2930","fi_303","","","","","",""
 "","","","","","","","","","","base","refund","","","","","","","",""
@@ -47,6 +55,10 @@
 "","","","","","","","","","","tax","invoice","account_1763","fi_307","","","","","",""
 "","","","","","","","","","","base","refund","","","","","","","",""
 "","","","","","","","","","","tax","refund","account_1763","fi_307","","","","","",""
+"tax_dom_purchase_goods_13_5","13.5%","","13.5%","13.5","tax_group_13_5","purchase","percent","","","base","invoice","","","","","13.5%","eu_no_vat,finland","",""
+"","","","","","","","","","","tax","invoice","account_1763","fi_307","","","","","",""
+"","","","","","","","","","","base","refund","","","","","","","",""
+"","","","","","","","","","","tax","refund","account_1763","fi_307","","","","","",""
 "tax_dom_purchase_goods_10","10%","","10%","10.0","tax_group_10","purchase","percent","False","","base","invoice","","","","","10%","eu_no_vat,finland","",""
 "","","","","","","","","","","tax","invoice","account_1763","fi_307","","","","","",""
 "","","","","","","","","","","base","refund","","","","","","","",""
@@ -63,6 +75,10 @@
 "","","","","","","","","","","tax","invoice","account_1763","fi_307","","","","","",""
 "","","","","","","","","","","base","refund","","","","","","","",""
 "","","","","","","","","","","tax","refund","account_1763","fi_307","","","","","",""
+"tax_dom_purchase_service_13_5","13.5% S","13.5% S","13.5%","13.5","tax_group_13_5","purchase","percent","","","base","invoice","","","","13.5% palvelua","13.5%","eu_no_vat,finland","",""
+"","","","","","","","","","","tax","invoice","account_1763","fi_307","","","","","",""
+"","","","","","","","","","","base","refund","","","","","","","",""
+"","","","","","","","","","","tax","refund","account_1763","fi_307","","","","","",""
 "tax_dom_purchase_service_10","10% S","10% S","10%","10.0","tax_group_10","purchase","percent","False","","base","invoice","","","","10% palvelua","10%","eu_no_vat,finland","",""
 "","","","","","","","","","","tax","invoice","account_1763","fi_307","","","","","",""
 "","","","","","","","","","","base","refund","","","","","","","",""
@@ -94,6 +110,12 @@
 "","","","","","","","","","","base","refund","","fi_base_purchase_goods_eu","","","","","",""
 "","","","","","","","","","","tax","refund","account_1763","fi_307||fi_305","","","","","",""
 "","","","","","","","","","","tax","refund","account_2930","","-100","","","","",""
+"tax_eu_purchase_goods_13_5","13.5% EU","13.5% EU","13.5%","13.5","tax_group_13_5","purchase","percent","","","base","invoice","","fi_base_purchase_goods_eu","","13.5% EU","13.5%","eu","tax_dom_purchase_goods_13_5",""
+"","","","","","","","","","","tax","invoice","account_1763","fi_307||fi_305","","","","","",""
+"","","","","","","","","","","tax","invoice","account_2930","","-100","","","","",""
+"","","","","","","","","","","base","refund","","fi_base_purchase_goods_eu","","","","","",""
+"","","","","","","","","","","tax","refund","account_1763","fi_307||fi_305","","","","","",""
+"","","","","","","","","","","tax","refund","account_2930","","-100","","","","",""
 "tax_eu_purchase_goods_10","10% EU G","10% EU G","10%","10.0","tax_group_10","purchase","percent","False","","base","invoice","","fi_base_purchase_goods_eu","","10% EU-tavarat","10%","eu","tax_dom_purchase_goods_10",""
 "","","","","","","","","","","tax","invoice","account_1763","fi_307||fi_305","","","","","",""
 "","","","","","","","","","","tax","invoice","account_2930","","-100","","","","",""
@@ -118,6 +140,12 @@
 "","","","","","","","","","","base","refund","","fi_base_306","","","","","",""
 "","","","","","","","","","","tax","refund","account_1763","fi_307||fi_tax_306","","","","","",""
 "","","","","","","","","","","tax","refund","account_2930","","-100","","","","",""
+"tax_eu_purchase_service_13_5","13.5% EU S","13.5% EU S","13.5%","13.5","tax_group_13_5","purchase","percent","","","base","invoice","","fi_base_306","","13.5 % EU-palvelusta","13.5%","eu","tax_dom_purchase_service_13_5",""
+"","","","","","","","","","","tax","invoice","account_1763","fi_307||fi_tax_306","","","","","",""
+"","","","","","","","","","","tax","invoice","account_2930","","-100","","","","",""
+"","","","","","","","","","","base","refund","","fi_base_306","","","","","",""
+"","","","","","","","","","","tax","refund","account_1763","fi_307||fi_tax_306","","","","","",""
+"","","","","","","","","","","tax","refund","account_2930","","-100","","","","",""
 "tax_eu_purchase_service_10","10% EU S","10% EU S","10%","10.0","tax_group_10","purchase","percent","False","","base","invoice","","fi_base_306","","10 % EU-palvelusta","10%","eu","tax_dom_purchase_service_10",""
 "","","","","","","","","","","tax","invoice","account_1763","fi_307||fi_tax_306","","","","","",""
 "","","","","","","","","","","tax","invoice","account_2930","","-100","","","","",""
@@ -178,6 +206,12 @@
 "","","","","","","","","","","base","refund","","fi_base_340","","","","","",""
 "","","","","","","","","","","tax","refund","account_1763","fi_307","","","","","",""
 "","","","","","","","","","","tax","refund","account_2930","fi_340","-100","","","","",""
+"tax_non_eu_purchase_goods_13_5","13.5% EX G","13.5% EX G","13.5%","13.5","tax_group_13_5","purchase","percent","","","base","invoice","","fi_base_340","","13.5 % EX-tavarat","13.5%","aland","tax_dom_purchase_goods_13_5",""
+"","","","","","","","","","","tax","invoice","account_1763","fi_307","","","","","",""
+"","","","","","","","","","","tax","invoice","account_2930","fi_340","-100","","","","",""
+"","","","","","","","","","","base","refund","","fi_base_340","","","","","",""
+"","","","","","","","","","","tax","refund","account_1763","fi_307","","","","","",""
+"","","","","","","","","","","tax","refund","account_2930","fi_340","-100","","","","",""
 "tax_non_eu_purchase_goods_10","10% EX G","10% EX G","10%","10.0","tax_group_10","purchase","percent","False","","base","invoice","","fi_base_340","","10% EX-tavarat","10%","aland","tax_dom_purchase_goods_10",""
 "","","","","","","","","","","tax","invoice","account_1763","fi_307","","","","","",""
 "","","","","","","","","","","tax","invoice","account_2930","fi_340","-100","","","","",""
diff --git a/addons/l10n_fi/data/template/account.tax.group-fi.csv b/addons/l10n_fi/data/template/account.tax.group-fi.csv
index 21bf84ce2ed8c0..0b3dada369bc9a 100644
--- a/addons/l10n_fi/data/template/account.tax.group-fi.csv
+++ b/addons/l10n_fi/data/template/account.tax.group-fi.csv
@@ -2,5 +2,6 @@
 "tax_group_25_5","VAT 25.5%","base.fi","account_1764","account_2939","ALV 25.5%"
 "tax_group_24","VAT 24%","base.fi","account_1764","account_2939","ALV 24%"
 "tax_group_14","VAT 14%","base.fi","account_1764","account_2939","ALV 14 %"
+"tax_group_13_5","VAT 13.5%","base.fi","account_1764","account_2939","ALV 13.5 %"
 "tax_group_10","VAT 10%","base.fi","account_1764","account_2939","ALV 10 %"
 "tax_group_0","VAT 0%","base.fi","account_1764","account_2939","ALV 0 %"