diff --git a/lib/core.js b/lib/core.js
index 04d6df500..8cc9578bd 100644
--- a/lib/core.js
+++ b/lib/core.js
@@ -23,6 +23,7 @@ const HELPERS = {
   reports: { file: 'reports' },
   manualjournals: { file: 'manualjournals' },
   repeatinginvoices: { file: 'repeatinginvoices' },
+  contactGroups: { file: 'contactgroups' },
 };
 
 function Core(application) {
diff --git a/lib/entities/accounting/contactgroup.js b/lib/entities/accounting/contactgroup.js
new file mode 100644
index 000000000..79bb82489
--- /dev/null
+++ b/lib/entities/accounting/contactgroup.js
@@ -0,0 +1,82 @@
+'use strict';
+
+const _ = require('lodash');
+const Entity = require('../entity');
+const ContactSchema = require('./contact').ContactSchema;
+
+const ContactGroupSchema = Entity.SchemaObject({
+  ContactGroupID: { type: String, toObject: 'always' },
+  Name: { type: String, toObject: 'always' },
+  Status: { type: String, toObject: 'always' },
+  Contacts: [ContactSchema],
+});
+
+const ContactGroup = Entity.extend(ContactGroupSchema, {
+  constructor: function(application, data, options) {
+    this.Entity.apply(this, arguments);
+  },
+  initialize: function(data, options) {},
+  save: function(options) {
+    const self = this;
+    let path = '';
+    let method = '';
+    if (this.ContactGroupID) {
+      path = `ContactGroups/${this.ContactGroupID}`;
+      method = 'post';
+    } else {
+      path = 'ContactGroups';
+      method = 'put';
+    }
+    return this.application.putOrPostEntity(
+      method,
+      path,
+      JSON.stringify(self),
+      {
+        entityPath: 'ContactGroups',
+        entityConstructor: function(data) {
+          return self.application.core.contactGroups.newContactGroup(data);
+        },
+      }
+    );
+  },
+  saveContacts: function(contacts) {
+    const self = this;
+    const path = `ContactGroups/${this.ContactGroupID}/Contacts`;
+    const method = 'put';
+
+    if (!_.isArray(contacts)) {
+      contacts = [contacts];
+    }
+
+    const payload = {
+      Contacts: contacts,
+    };
+
+    return this.application.putOrPostEntity(
+      method,
+      path,
+      JSON.stringify(payload),
+      {
+        entityPath: 'Contacts',
+        entityConstructor: function(data) {
+          return self.application.core.contacts.newContact(data);
+        },
+      }
+    );
+  },
+  deleteContact: function(contactID) {
+    return this.deleteContacts(contactID);
+  },
+  deleteContacts: function(contactID) {
+    let path = `ContactGroups/${this.ContactGroupID}/Contacts/`;
+
+    if (contactID) {
+      path += contactID;
+    }
+
+    return this.application.deleteEntities(path);
+  },
+});
+
+module.exports.ContactGroup = ContactGroup;
+module.exports.ContactGroupSchema = ContactGroupSchema;
diff --git a/lib/entity_helpers/accounting/contactgroups.js b/lib/entity_helpers/accounting/contactgroups.js
new file mode 100644
index 000000000..b9bcf6417
--- /dev/null
+++ b/lib/entity_helpers/accounting/contactgroups.js
@@ -0,0 +1,35 @@
+'use strict';
+
+const _ = require('lodash');
+const EntityHelper = require('../entity_helper');
+const ContactGroup = require('../../entities/accounting/contactgroup').ContactGroup;
+
+const ContactGroups = EntityHelper.extend({
+  constructor: function(application, options) {
+    EntityHelper.call(
+      this,
+      application,
+      Object.assign({ entityPlural: 'ContactGroups' }, options)
+    );
+  },
+  newContactGroup: function(data, options) {
+    return new ContactGroup(this.application, data, options);
+  },
+  getContactGroups: function(options) {
+    return this.getEntities(this.setUpOptions(options));
+  },
+  getContactGroup: function(id) {
+    return this.getContactGroups({ id }).then(contactGroups =>
+      _.first(contactGroups)
+    );
+  },
+  setUpOptions: function(options) {
+    const self = this;
+    const clonedOptions = _.clone(options || {});
+    clonedOptions.entityPath = 'ContactGroups';
+    clonedOptions.entityConstructor = data => self.newContactGroup(data);
+    return clonedOptions;
+  }
+});
+
+module.exports = ContactGroups;
diff --git a/test/core/contactgroups_tests.js b/test/core/contactgroups_tests.js
new file mode 100644
index 000000000..4e47055fc
--- /dev/null
+++ b/test/core/contactgroups_tests.js
@@ -0,0 +1,184 @@
+'use strict';
+
+const common = require('../common/common');
+const functions = require('../common/functions');
+
+const expect = common.expect;
+const wrapError = functions.wrapError;
+
+const validateContactGroup = contactGroup => {
+  if (!contactGroup) {
+    return false;
+  }
+
+  expect(contactGroup.ContactGroupID).to.be.a('String');
+  expect(contactGroup.Name).to.be.a('String');
+  expect(contactGroup.Status).to.be.a('String');
+  expect(contactGroup.Contacts.length).to.be.a('Number');
+  contactGroup.Contacts.forEach(contact => {
+    expect(contact.ContactID).to.be.a('String');
+    expect(contact.Name).to.be.a('String');
+  });
+
+  return true;
+};
+
+describe('Contact Groups', () => {
+  let contactGroupID = '';
+  const sampleContactGroup = {
+    Name: `Test Contact Group: ${Math.random()}`,
+    Status: 'ACTIVE',
+  };
+  it('get all', done => {
+    common.currentApp.core.contactGroups
+      .getContactGroups()
+      .then(contactGroups => {
+        expect(contactGroups).to.have.length.greaterThan(0);
+        contactGroups.forEach(contactGroup => {
+          expect(validateContactGroup(contactGroup)).to.equal(true);
+          contactGroupID = contactGroup.ContactGroupID;
+        });
+        done();
+      })
+      .catch(err => {
+        console.error(err);
+        done(wrapError(err));
+      });
+  });
+
+  it('get single', done => {
+    common.currentApp.core.contactGroups
+      .getContactGroup(contactGroupID)
+      .then(contactGroup => {
+        expect(validateContactGroup(contactGroup)).to.equal(true);
+        done();
+      })
+      .catch(err => {
+        console.error(err);
+        done(wrapError(err));
+      });
+  });
+
+  it('creates a contact group', done => {
+    const contactGroup = common.currentApp.core.contactGroups.newContactGroup(
+      sampleContactGroup
+    );
+
+    contactGroup
+      .save()
+      .then(response => {
+        expect(validateContactGroup(response.entities[0])).to.equal(true);
+        sampleContactGroup.ContactGroupID = response.entities[0].ContactGroupID;
+        done();
+      })
+      .catch(err => {
+        console.error(err);
+        done(wrapError(err));
+      });
+  });
+
+  it('Updates a contact group', done => {
+    const updatedName = `Updated ${Math.random()}`;
+    common.currentApp.core.contactGroups
+      .getContactGroup(sampleContactGroup.ContactGroupID)
+      .then(contactGroup => {
+        expect(validateContactGroup(contactGroup)).to.equal(true);
+        contactGroup.Name = updatedName;
+        return contactGroup.save();
+      })
+      .then(response => {
+        expect(validateContactGroup(response.entities[0])).to.equal(true);
+        expect(response.entities[0].Name).to.equal(updatedName);
+        done();
+      })
+      .catch(err => {
+        console.error(err);
+        done(wrapError(err));
+      });
+  });
+
+  it('Adds a contact to a contact group', done => {
+    const sampleContacts = [];
+    common.currentApp.core.contacts
+      .getContacts()
+      .then(contacts => {
+        for (let i = 0; i < 5; i += 1) {
+          sampleContacts.push({
+            ContactID: contacts[i].ContactID,
+          });
+        }
+      })
+      .then(() =>
+        common.currentApp.core.contactGroups.getContactGroup(
+          sampleContactGroup.ContactGroupID
+        )
+      )
+      .then(contactGroup => {
+        expect(validateContactGroup(contactGroup)).to.equal(true);
+        return contactGroup.saveContacts(sampleContacts);
+      })
+      .then(response => {
+        response.entities.forEach((contact, idx) => {
+          expect(contact.ContactID).to.equal(sampleContacts[idx].ContactID);
+        });
+        done();
+      })
+      .catch(err => {
+        console.error(err);
+        done(wrapError(err));
+      });
+  });
+
+  it('Deletes a specific contact from a contact group', done => {
+    let contactIDToRemove = '';
+    common.currentApp.core.contactGroups
+      .getContactGroup(sampleContactGroup.ContactGroupID)
+      .then(contactGroup => {
+        expect(validateContactGroup(contactGroup)).to.equal(true);
+        contactIDToRemove = contactGroup.Contacts[0].ContactID;
+        return contactGroup.deleteContact(contactIDToRemove);
+      })
+      .then(() => {
+        done();
+      })
+      .catch(err => {
+        console.error(err);
+        done(wrapError(err));
+      });
+  });
+
+  it('Deletes all contacts from a contact group', done => {
+    common.currentApp.core.contactGroups
+      .getContactGroup(sampleContactGroup.ContactGroupID)
+      .then(contactGroup => {
+        expect(validateContactGroup(contactGroup)).to.equal(true);
+        return contactGroup.deleteContacts();
+      })
+      .then(() => {
+        done();
+      })
+      .catch(err => {
+        console.error(err);
+        done(wrapError(err));
+      });
+  });
+
+  it('Deletes a contact group', done => {
+    common.currentApp.core.contactGroups
+      .getContactGroup(sampleContactGroup.ContactGroupID)
+      .then(contactGroup => {
+        expect(validateContactGroup(contactGroup)).to.equal(true);
+        contactGroup.Status = 'DELETED';
+        return contactGroup.save();
+      })
+      .then(response => {
+        expect(validateContactGroup(response.entities[0])).to.equal(true);
+        expect(response.entities[0].Status).to.equal('DELETED');
+        done();
+      })
+      .catch(err => {
+        console.error(err);
+        done(wrapError(err));
+      });
+  });
+});
diff --git a/test/testrunner.js b/test/testrunner.js
index 5e6af26ba..3aaa36e27 100644
--- a/test/testrunner.js
+++ b/test/testrunner.js
@@ -52,6 +52,7 @@ describe('Accounting API Tests', () => {
     'repeatinginvoice_tests',
     `${__dirname}/core/repeatinginvoice_tests.js`
   );
+  importTest('contactgroups_tests', `${__dirname}/core/contactgroups_tests.js`);
 });
 
 describe.skip('Payroll API Tests', () => {