diff --git a/lib/jquery.payment.js b/lib/jquery.payment.js
index 763bf3d..7c0c5fc 100644
--- a/lib/jquery.payment.js
+++ b/lib/jquery.payment.js
@@ -1,6 +1,6 @@
 // Generated by CoffeeScript 1.4.0
 (function() {
-  var $, cardFromNumber, cardFromType, cards, formatBackCardNumber, formatBackExpiry, formatCardNumber, formatExpiry, formatForwardExpiry, formatForwardSlash, hasTextSelected, luhnCheck, restrictCVC, restrictCardNumber, restrictExpiry, restrictNumeric, setCardType,
+  var $, cardFromNumber, cardFromType, cards, defaultFormat, formatBackCardNumber, formatBackExpiry, formatCardNumber, formatExpiry, formatForwardExpiry, formatForwardSlash, hasTextSelected, luhnCheck, restrictCVC, restrictCardNumber, restrictExpiry, restrictNumeric, setCardType,
     __slice = [].slice,
     __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; },
     _this = this;
@@ -17,57 +17,69 @@
     return $.payment.fn[method].apply(this, args);
   };
 
+  defaultFormat = /(\d{1,4})/g;
+
   cards = [
     {
       type: 'maestro',
       pattern: /^(5018|5020|5038|6304|6759|676[1-3])/,
+      format: defaultFormat,
       length: [12, 13, 14, 15, 16, 17, 18, 19],
       cvcLength: [3],
       luhn: true
     }, {
       type: 'dinersclub',
       pattern: /^(36|38|30[0-5])/,
+      format: defaultFormat,
       length: [14],
       cvcLength: [3],
       luhn: true
     }, {
       type: 'laser',
       pattern: /^(6706|6771|6709)/,
+      format: defaultFormat,
       length: [16, 17, 18, 19],
       cvcLength: [3],
       luhn: true
     }, {
       type: 'jcb',
       pattern: /^35/,
+      format: defaultFormat,
       length: [16],
       cvcLength: [3],
       luhn: true
     }, {
       type: 'unionpay',
       pattern: /^62/,
+      format: defaultFormat,
       length: [16, 17, 18, 19],
+      cvcLength: [3],
       luhn: false
     }, {
       type: 'discover',
       pattern: /^(6011|65|64[4-9]|622)/,
+      format: defaultFormat,
       length: [16],
       cvcLength: [3],
       luhn: true
     }, {
       type: 'mastercard',
       pattern: /^5[1-5]/,
+      format: defaultFormat,
       length: [16],
       cvcLength: [3],
       luhn: true
     }, {
       type: 'amex',
       pattern: /^3[47]/,
+      format: /(\d{1,4})(\d{1,6})?(\d{1,5})?/,
       length: [15],
       cvcLength: [3, 4],
       luhn: true
     }, {
       type: 'visa',
       pattern: /^4/,
+      format: defaultFormat,
       length: [13, 14, 15, 16],
       cvcLength: [3],
       luhn: true
@@ -436,4 +448,21 @@
     return ((_ref = cardFromNumber(num)) != null ? _ref.type : void 0) || null;
   };
 
+  $.payment.formatCardNumber = function(num) {
+    var card, groups, _ref;
+    card = cardFromNumber(num);
+    if (!card) {
+      return num;
+    }
+    if (card.format.global) {
+      return (_ref = num.match(card.format)) != null ? _ref.join(' ') : void 0;
+    } else {
+      groups = card.format.exec(num);
+      if (groups != null) {
+        groups.shift();
+      }
+      return groups != null ? groups.join(' ') : void 0;
+    }
+  };
+
 }).call(this);
diff --git a/src/jquery.payment.coffee b/src/jquery.payment.coffee
index 617608d..25401b9 100644
--- a/src/jquery.payment.coffee
+++ b/src/jquery.payment.coffee
@@ -6,10 +6,13 @@ $.fn.payment = (method, args...) ->
 
 # Utils
 
+defaultFormat = /(\d{1,4})/g
+
 cards = [
   {
       type: 'maestro'
       pattern: /^(5018|5020|5038|6304|6759|676[1-3])/
+      format: defaultFormat
       length: [12..19]
       cvcLength: [3]
       luhn: true
@@ -17,6 +20,7 @@ cards = [
   {
       type: 'dinersclub'
       pattern: /^(36|38|30[0-5])/
+      format: defaultFormat
       length: [14]
       cvcLength: [3]
       luhn: true
@@ -24,6 +28,7 @@ cards = [
   {
       type: 'laser'
       pattern: /^(6706|6771|6709)/
+      format: defaultFormat
       length: [16..19]
       cvcLength: [3]
       luhn: true
@@ -31,6 +36,7 @@ cards = [
   {
       type: 'jcb'
       pattern: /^35/
+      format: defaultFormat
       length: [16]
       cvcLength: [3]
       luhn: true
@@ -38,12 +44,15 @@ cards = [
   {
       type: 'unionpay'
       pattern: /^62/
+      format: defaultFormat
       length: [16..19]
+      cvcLength: [3]
       luhn: false
   }
   {
       type: 'discover'
       pattern: /^(6011|65|64[4-9]|622)/
+      format: defaultFormat
       length: [16]
       cvcLength: [3]
       luhn: true
@@ -51,6 +60,7 @@ cards = [
   {
       type: 'mastercard'
       pattern: /^5[1-5]/
+      format: defaultFormat
       length: [16]
       cvcLength: [3]
       luhn: true
@@ -58,6 +68,7 @@ cards = [
   {
       type: 'amex'
       pattern: /^3[47]/
+      format: /(\d{1,4})(\d{1,6})?(\d{1,5})?/
       length: [15]
       cvcLength: [3..4]
       luhn: true
@@ -65,6 +76,7 @@ cards = [
   {
       type: 'visa'
       pattern: /^4/
+      format: defaultFormat
       length: [13..16]
       cvcLength: [3]
       luhn: true
@@ -387,3 +399,14 @@ $.payment.validateCardCVC = (cvc, type) ->
 $.payment.cardType = (num) ->
   return null unless num
   cardFromNumber(num)?.type or null
+
+$.payment.formatCardNumber = (num) ->
+  card = cardFromNumber(num)
+  return num unless card
+
+  if card.format.global
+    num.match(card.format)?.join(' ')
+  else
+    groups = card.format.exec(num)
+    groups?.shift()
+    groups?.join(' ')
\ No newline at end of file