diff --git a/modules/bigtable-instance/README.md b/modules/bigtable-instance/README.md
index 05dcbdde..42ad0975 100644
--- a/modules/bigtable-instance/README.md
+++ b/modules/bigtable-instance/README.md
@@ -230,15 +230,16 @@ module "bigtable-instance" {
 | name | description | type | required | default |
 |---|---|:---:|:---:|:---:|
 | [clusters](variables.tf#L17) | Clusters to be created in the BigTable instance. Set more than one cluster to enable replication. If you set autoscaling, num_nodes will be ignored. | <code title="map&#40;object&#40;&#123;&#10;  zone         &#61; optional&#40;string&#41;&#10;  storage_type &#61; optional&#40;string&#41;&#10;  num_nodes    &#61; optional&#40;number&#41;&#10;  autoscaling &#61; optional&#40;object&#40;&#123;&#10;    min_nodes      &#61; number&#10;    max_nodes      &#61; number&#10;    cpu_target     &#61; number&#10;    storage_target &#61; optional&#40;number&#41;&#10;  &#125;&#41;&#41;&#10;&#125;&#41;&#41;">map&#40;object&#40;&#123;&#8230;&#125;&#41;&#41;</code> | ✓ |  |
-| [name](variables.tf#L81) | The name of the Cloud Bigtable instance. | <code>string</code> | ✓ |  |
-| [project_id](variables.tf#L86) | Id of the project where datasets will be created. | <code>string</code> | ✓ |  |
+| [name](variables.tf#L87) | The name of the Cloud Bigtable instance. | <code>string</code> | ✓ |  |
+| [project_id](variables.tf#L92) | Id of the project where datasets will be created. | <code>string</code> | ✓ |  |
 | [default_autoscaling](variables.tf#L33) | Default settings for autoscaling of clusters. This will be the default autoscaling for any cluster not specifying any autoscaling details. | <code title="object&#40;&#123;&#10;  min_nodes      &#61; number&#10;  max_nodes      &#61; number&#10;  cpu_target     &#61; number&#10;  storage_target &#61; optional&#40;number&#41;&#10;&#125;&#41;">object&#40;&#123;&#8230;&#125;&#41;</code> |  | <code>null</code> |
 | [default_gc_policy](variables.tf#L44) | Default garbage collection policy, to be applied to all column families and all tables. Can be override in the tables variable for specific column families. | <code title="object&#40;&#123;&#10;  deletion_policy &#61; optional&#40;string&#41;&#10;  gc_rules        &#61; optional&#40;string&#41;&#10;  mode            &#61; optional&#40;string&#41;&#10;  max_age         &#61; optional&#40;string&#41;&#10;  max_version     &#61; optional&#40;string&#41;&#10;&#125;&#41;">object&#40;&#123;&#8230;&#125;&#41;</code> |  | <code>null</code> |
 | [deletion_protection](variables.tf#L56) | Whether or not to allow Terraform to destroy the instance. Unless this field is set to false in Terraform state, a terraform destroy or terraform apply that would delete the instance will fail. | <code>bool</code> |  | <code>true</code> |
 | [display_name](variables.tf#L63) | The human-readable display name of the Bigtable instance. | <code>string</code> |  | <code>null</code> |
-| [iam](variables.tf#L69) | IAM bindings for topic in {ROLE => [MEMBERS]} format. | <code>map&#40;list&#40;string&#41;&#41;</code> |  | <code>&#123;&#125;</code> |
-| [labels](variables.tf#L75) | Labels to be attached to the instance. | <code>map&#40;string&#41;</code> |  | <code>&#123;&#125;</code> |
-| [tables](variables.tf#L91) | Tables to be created in the BigTable instance. | <code title="map&#40;object&#40;&#123;&#10;  split_keys &#61; optional&#40;list&#40;string&#41;, &#91;&#93;&#41;&#10;  column_families &#61; optional&#40;map&#40;object&#40;&#10;    &#123;&#10;      gc_policy &#61; optional&#40;object&#40;&#123;&#10;        deletion_policy &#61; optional&#40;string&#41;&#10;        gc_rules        &#61; optional&#40;string&#41;&#10;        mode            &#61; optional&#40;string&#41;&#10;        max_age         &#61; optional&#40;string&#41;&#10;        max_version     &#61; optional&#40;string&#41;&#10;      &#125;&#41;, null&#41;&#10;  &#125;&#41;&#41;, &#123;&#125;&#41;&#10;&#125;&#41;&#41;">map&#40;object&#40;&#123;&#8230;&#125;&#41;&#41;</code> |  | <code>&#123;&#125;</code> |
+| [encryption_key](variables.tf#L69) | The KMS key id to used for encryption of the Bigtable instance. | <code>string</code> |  | <code>null</code> |
+| [iam](variables.tf#L75) | IAM bindings for topic in {ROLE => [MEMBERS]} format. | <code>map&#40;list&#40;string&#41;&#41;</code> |  | <code>&#123;&#125;</code> |
+| [labels](variables.tf#L81) | Labels to be attached to the instance. | <code>map&#40;string&#41;</code> |  | <code>&#123;&#125;</code> |
+| [tables](variables.tf#L97) | Tables to be created in the BigTable instance. | <code title="map&#40;object&#40;&#123;&#10;  split_keys &#61; optional&#40;list&#40;string&#41;, &#91;&#93;&#41;&#10;  column_families &#61; optional&#40;map&#40;object&#40;&#10;    &#123;&#10;      gc_policy &#61; optional&#40;object&#40;&#123;&#10;        deletion_policy &#61; optional&#40;string&#41;&#10;        gc_rules        &#61; optional&#40;string&#41;&#10;        mode            &#61; optional&#40;string&#41;&#10;        max_age         &#61; optional&#40;string&#41;&#10;        max_version     &#61; optional&#40;string&#41;&#10;      &#125;&#41;, null&#41;&#10;  &#125;&#41;&#41;, &#123;&#125;&#41;&#10;&#125;&#41;&#41;">map&#40;object&#40;&#123;&#8230;&#125;&#41;&#41;</code> |  | <code>&#123;&#125;</code> |
 
 ## Outputs
 
diff --git a/modules/bigtable-instance/main.tf b/modules/bigtable-instance/main.tf
index 309bbb1a..3aafaf26 100644
--- a/modules/bigtable-instance/main.tf
+++ b/modules/bigtable-instance/main.tf
@@ -49,6 +49,7 @@ resource "google_bigtable_instance" "default" {
       zone         = cluster.value.zone
       storage_type = cluster.value.storage_type
       num_nodes    = cluster.value.num_nodes
+      kms_key_name = var.encryption_key
 
       dynamic "autoscaling_config" {
         for_each = cluster.value.autoscaling == null ? [] : [""]
diff --git a/modules/bigtable-instance/variables.tf b/modules/bigtable-instance/variables.tf
index 132d5c2c..ca1fbb0e 100644
--- a/modules/bigtable-instance/variables.tf
+++ b/modules/bigtable-instance/variables.tf
@@ -66,6 +66,12 @@ variable "display_name" {
   default     = null
 }
 
+variable "encryption_key" {
+  description = "The KMS key id to used for encryption of the Bigtable instance."
+  type        = string
+  default     = null
+}
+
 variable "iam" {
   description = "IAM bindings for topic in {ROLE => [MEMBERS]} format."
   type        = map(list(string))