There are several Bible verses about giving to God, usually interpreted as giving 10%. A popular bumper sticker about the Internal Revenue Service (IRS) is:
 
“If 10% is enough for God, it’s enough for the IRS.”
 
“If 10 percent is good enough for God, shouldn’t it should be enough for the IRS?!” was cited in a book published in 2000. Authorship of the one-line saying is unknown.
 
   
Google Books
Money:
Clues for the Clueless
By Christopher D. Hudson
Uhrichsville, OH: Promise Press
2000
Pg. ?:
If 10 percent is good enough for God, shouldn’t it should be enough for the IRS?!
 
Google Groups: alt.invest.penny-stocks
INFLATION IS NIL
Roy Merrill
5/14/00
if 10% is good enough for god .......why isn’t good enough for the IRS??????
 
Google Books
Eight O’Clock Ferry to the Windward Side:
Seeking Justice in Guantanamo Bay
By Clive Stafford Smith
New York, NY: Nation Books
2007
Pg. 17:
I walk past a parked Island Mechanical truck, with its bumper sticker: ‘If 10% is enough for God, it’s enough for the IRS’ (the Internal Revenue Service).
 
TaxProf Blog
Tuesday, December 18, 2007
Christmas Gifts for that Special Tax Person
By Paul Caron
Check out this postcard on eBay:
 
If 10% Is Enough For God, It’s Enough For The IRS
   
Twitter
Josh Bayne
‏@joshbayne
Just saw this bumper sticker: “If 10% is enough for God, it’s enough for the IRS.”
I’d sign up for that plan. ☑️
6:25 PM - 6 Oct 2015
 
The Independent Florida Alligator
IRS:The Misunderstood Nerds
Posted: Thursday, October 15, 2015 1:54 am
By Joseph Buss, Alligator Blogger
As I was unfortunately driving on my scooter in a near hurricane, I saw a bumper sticker that read “If 10% is enough for god, it’s enough for the IRS”. While I admire his passion to limit the distinction between church and state, however I did have a problem with his overall logic. Contrary to popular opinion, the IRS is not to blame for how much money you pay in taxes every year.