diff --git a/README.md b/README.md
index 542e2c7..0ede090 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ Creates a nat gateway and automatically adds a route table to the route tables p
 * [`private_route_tables`]: List(required): List of private route tables that require the nat gateway [NOTE the number of nat gateways should match the number of private routes]
 * [`number_nat_gateways`]: String(optional):  Number of nat gateways required
 * [`public_subnets`]: List(required): The subnets where we are going to create/deploy the NAT gateways
+* [`tags`]: Map(optional): optional tags
 
 ### Output
 
diff --git a/nat_gateway/main.tf b/nat_gateway/main.tf
index 1370895..d9a35a4 100644
--- a/nat_gateway/main.tf
+++ b/nat_gateway/main.tf
@@ -13,9 +13,7 @@ resource "aws_nat_gateway" "gateway" {
   allocation_id = "${aws_eip.nat_gateway.*.id[count.index]}"
   subnet_id = "${var.public_subnets[count.index]}"
 
-  tags {
-    Name = "${data.aws_subnet.ngw_subnets.*.availability_zone[count.index]}"
-  }
+  tags = "${merge(var.tags, map("Name", data.aws_subnet.ngw_subnets.*.availability_zone[count.index]))}"
 }
 
 resource "aws_route" "r" {
diff --git a/nat_gateway/variables.tf b/nat_gateway/variables.tf
index 0ba4e54..8c96b4e 100644
--- a/nat_gateway/variables.tf
+++ b/nat_gateway/variables.tf
@@ -7,3 +7,9 @@ variable "number_nat_gateways" {
 variable "public_subnets" {
   type = "list"
 }
+
+variable "tags" {
+  type        = "map"
+  description = "Optional extra tags"
+  default     = {}
+}