diff --git a/base/src/expressions/parser/static_analysis.rs b/base/src/expressions/parser/static_analysis.rs
index 6253d82..97840c2 100644
--- a/base/src/expressions/parser/static_analysis.rs
+++ b/base/src/expressions/parser/static_analysis.rs
@@ -876,6 +876,8 @@ fn get_function_args_signature(kind: &Function, arg_count: usize) -> Vec<Signatu
         Function::Sheets => args_signature_scalars(arg_count, 0, 1),
         Function::Cell => args_signature_scalars(arg_count, 1, 1),
         Function::Info => args_signature_scalars(arg_count, 1, 1),
+        Function::Accrint => args_signature_scalars(arg_count, 6, 2),
+        Function::Accrintm => args_signature_scalars(arg_count, 4, 1),
     }
 }
 
@@ -1139,5 +1141,7 @@ fn static_analysis_on_function(kind: &Function, args: &[Node]) -> StaticResult {
         Function::Sheets => scalar_arguments(args),
         Function::Cell => scalar_arguments(args),
         Function::Info => scalar_arguments(args),
+        Function::Accrint => scalar_arguments(args),
+        Function::Accrintm => scalar_arguments(args),
     }
 }
diff --git a/base/src/functions/financial.rs b/base/src/functions/financial.rs
index 8e11ee4..39990b7 100644
--- a/base/src/functions/financial.rs
+++ b/base/src/functions/financial.rs
@@ -1830,4 +1830,14 @@ impl Model {
 
         CalcResult::Number(rate * (cost - result))
     }
+
+    // ACCRINT(issue, first_interest, settlement, rate, par, frequency, [basis], [calc_method])
+    pub(crate) fn fn_accrint(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
+        todo!()
+    }
+
+    // ACCRINTM(issue, settlement, rate, par, [basis])
+    pub(crate) fn fn_accrintm(&mut self, args: &[Node], cell: CellReferenceIndex) -> CalcResult {
+        todo!()
+    }
 }
diff --git a/base/src/functions/mod.rs b/base/src/functions/mod.rs
index 53a2868..671ecb3 100644
--- a/base/src/functions/mod.rs
+++ b/base/src/functions/mod.rs
@@ -217,6 +217,8 @@ pub enum Function {
     Isoweeknum,
 
     // Financial
+    Accrint,
+    Accrintm,
     Cumipmt,
     Cumprinc,
     Db,
@@ -313,7 +315,7 @@ pub enum Function {
 }
 
 impl Function {
-    pub fn into_iter() -> IntoIter<Function, 256> {
+    pub fn into_iter() -> IntoIter<Function, 258> {
         [
             Function::And,
             Function::False,
@@ -571,6 +573,8 @@ impl Function {
             Function::Cell,
             Function::Info,
             Function::Sheets,
+            Function::Accrint,
+            Function::Accrintm,
         ]
         .into_iter()
     }
@@ -908,6 +912,8 @@ impl Function {
             "CELL" => Some(Function::Cell),
             "INFO" => Some(Function::Info),
             "SHEETS" | "_XLFN.SHEETS" => Some(Function::Sheets),
+            "ACCRINT" => Some(Function::Accrint),
+            "ACCRINTM" => Some(Function::Accrintm),
 
             _ => None,
         }
@@ -1174,6 +1180,9 @@ impl fmt::Display for Function {
             Function::Cell => write!(f, "CELL"),
             Function::Info => write!(f, "INFO"),
             Function::Sheets => write!(f, "SHEETS"),
+
+            Function::Accrint => write!(f, "ACCRINT"),
+            Function::Accrintm => write!(f, "ACCRINTM"),
         }
     }
 }
@@ -1458,6 +1467,8 @@ impl Model {
             Function::Cell => self.fn_cell(args, cell),
             Function::Info => self.fn_info(args, cell),
             Function::Sheets => self.fn_sheets(args, cell),
+            Function::Accrint => self.fn_accrint(args, cell),
+            Function::Accrintm => self.fn_accrintm(args, cell),
         }
     }
 }
diff --git a/base/src/test/mod.rs b/base/src/test/mod.rs
index f48604f..3f59253 100644
--- a/base/src/test/mod.rs
+++ b/base/src/test/mod.rs
@@ -61,6 +61,7 @@ mod test_number_format;
 mod test_arrays;
 mod test_escape_quotes;
 mod test_extend;
+mod test_fn_accrint;
 mod test_fn_fv;
 mod test_fn_round;
 mod test_fn_type;
diff --git a/base/src/test/test_fn_accrint.rs b/base/src/test/test_fn_accrint.rs
new file mode 100644
index 0000000..a33bbd5
--- /dev/null
+++ b/base/src/test/test_fn_accrint.rs
@@ -0,0 +1,23 @@
+#![allow(clippy::unwrap_used)]
+
+use crate::test::util::new_empty_model;
+
+#[test]
+fn fn_average_accrint_simple_cases() {
+    let mut model = new_empty_model();
+    // ACCRINT(issue, first_interest, settlement, rate, par, frequency, [basis], [calc_method])
+    model._set("A1", "=ACCRINT(39508, 39691, 39569, 0.1, 1000, 2, 0)");
+    model._set(
+        "A2",
+        "=ACCRINT(DATE(2008, 3, 5), 39691, 39569, 0.1, 1000, 2, 0, FALSE)",
+    );
+    model._set(
+        "A3",
+        "=ACCRINT(DATE(2008, 4, 5), 39691, 39569, 0.1, 1000, 2, 0, TRUE)",
+    );
+    model.evaluate();
+
+    assert_eq!(model._get_text("A1"), *"16.666666667");
+    assert_eq!(model._get_text("A2"), *"15.555555556");
+    assert_eq!(model._get_text("A3"), *"7.222222222");
+}
diff --git a/xlsx/tests/calc_tests/ACCRINT_ACCRINTM.xlsx b/xlsx/tests/calc_tests/ACCRINT_ACCRINTM.xlsx
new file mode 100644
index 0000000..258d35e
Binary files /dev/null and b/xlsx/tests/calc_tests/ACCRINT_ACCRINTM.xlsx differ