diff --git a/financial/present_value.py b/financial/present_value.py
index f74612b923af..d01d8aeec646 100644
--- a/financial/present_value.py
+++ b/financial/present_value.py
@@ -11,12 +11,14 @@
 
 def present_value(discount_rate: float, cash_flows: list[float]) -> float:
     """
+    >>> present_value(0.13, [10])
+    8.85
     >>> present_value(0.13, [10, 20.70, -293, 297])
-    4.69
+    4.15
     >>> present_value(0.07, [-109129.39, 30923.23, 15098.93, 29734,39])
-    -42739.63
+    -39943.58
     >>> present_value(0.07, [109129.39, 30923.23, 15098.93, 29734,39])
-    175519.15
+    164036.59
     >>> present_value(-1, [109129.39, 30923.23, 15098.93, 29734,39])
     Traceback (most recent call last):
         ...
@@ -31,7 +33,7 @@ def present_value(discount_rate: float, cash_flows: list[float]) -> float:
     if not cash_flows:
         raise ValueError("Cash flows list cannot be empty")
     present_value = sum(
-        cash_flow / ((1 + discount_rate) ** i) for i, cash_flow in enumerate(cash_flows)
+        cash_flow / ((1 + discount_rate) ** (i+1)) for i, cash_flow in enumerate(cash_flows)
     )
     return round(present_value, ndigits=2)