diff --git a/src/main/java/cn/palmte/work/bean/EstimateBean.java b/src/main/java/cn/palmte/work/bean/EstimateBean.java
index a50b8b2..204953c 100644
--- a/src/main/java/cn/palmte/work/bean/EstimateBean.java
+++ b/src/main/java/cn/palmte/work/bean/EstimateBean.java
@@ -12,6 +12,6 @@ public class EstimateBean extends IncomeCostBean{
      */
     @Override
     protected BigDecimal handleSpecial(BigDecimal src) {
-        return src;
+        return null == src ? new BigDecimal(0) : src;
     }
 }