diff --git a/README.md b/README.md
index 1f1df42..aea260a 100644
--- a/README.md
+++ b/README.md
@@ -72,6 +72,7 @@ item is VAT free), :to (the date from which this item is valid), :from (the date
 The price can be provided in one of the following ways:
 
  * :netto            - is a set price and will be displayed as provided
+ * :brutto           - is a set price and will be first scaled down to netto
  * :hourly           - is an hourly price - worklogs will be queried in order to work out how many hours should be billed.
                        If no worklog could be found (or its :worked is nil), this item will be skipped.
  * :base + :per-day  - in the case of a variable number of hours worked. :base provides the amount that would be paid
diff --git a/src/invoices/calc.clj b/src/invoices/calc.clj
index 721c57d..f69cb7e 100644
--- a/src/invoices/calc.clj
+++ b/src/invoices/calc.clj
@@ -7,6 +7,7 @@
   (if-not vat-level 0 (* netto (/ vat-level 100))))
 
 (defn brutto [{netto :netto :as item}] (round (+ netto (vat item))))
+(defn netto [{brutto :brutto vat :vat}] (/ (* brutto 100) (+ 100 vat)))
 
 (defn parse-custom
   "Parse the given function definition and execute it with the given `worklog`."
@@ -36,5 +37,6 @@
     (contains? item :function) (assoc item :netto (calc-custom worked item))
     (contains? item :hourly) (assoc item :netto (calc-hourly worked item))
     (contains? item :base) (assoc item :netto (calc-part-time worked item))
+    (contains? item :brutto) (assoc item :netto (netto item))
     (not (contains? item :netto)) (assoc item :netto 0)
     :else item))