A Christmas riddle is:
 
Q: How much did Santa’s sleigh cost?
A: Nothing, it was on the house.
 
“On the house” means “free.” The joke was posted on Twitter on December 3, 2011, and has been printed on a few images.
 
     
Twitter 
George Sayah‏
@MGSayah
How much did Santa pay for his sleigh?
Nothing, it was on the house!
1:00 PM - 3 Dec 2011
 
Twitter
Nation Ent.‏
@ItsNationDotCom
How much did Santa’s sleigh cost? Nothing, it was on the house..
9:14 AM - 9 Dec 2011
 
Twitter
Rescue Chicken.‏
@CreoleBabyBritt
*rimshot* “@TheMekShow How much did Santa’s sleigh cost? Nothing, it was on the house..”
9:22 AM - 9 Dec 2011
 
Facebook
Nacho Jokes w/Cheese
December 15, 2013 ·
How much did Santa’s sleigh cost him? Nothing, it was the on the house.
   
29 December 2013, Sunday Times (London, UK), “With parliament” by Roland White, pg. 22:
Continuing the festive theme, he asks: “How much did Santa pay for his sleigh? Nothing. It was on the house.”
     
Google Books
More Laugh-Out-Loud Jokes for Kids
By Rob Elliott
Grand Rapids, MI: Revell
2014
Pg. ?:
Q: How much did Santa’s sleigh cost?
A: Nothing—it was on the house!
   
Facebook
Southern Ale House
December 20, 2015 ·
How much did Santa’s sleigh cost? Nothing.. It was on the house… If you didn’t laugh then you need some Christmas cheer! Come on out for brunch and enjoy our tacky sweaters and delicious food! #tackysweaters #brunchlife #uniquelysouthern #christmascheer #santaiknowhimiknowhim
 
Twitter
Kevin Wyatt‏
@Kevin_Wyatt
How much did Santa’s sleigh cost?
Nothing it was on the house!
#25DaysofBadChristmasJokes #LastDay
10:23 AM - 25 Dec 2015
 
Reddit—Jokes
How much did Santa’s Sleigh cost?
submitted December 12, 2016 by [deleted]
Nothing. It was on the house.
 
Reddit—Jokes
How much does Santa’s sleigh cost?
submitted November 30, 2017 by kittycait88
$0, it’s on the house.
COMMENTS
ReubenZWeiner
Its pulled by about 8 bucks