TheGrint HQ
8 minutes
Updated
October 30, 2026
Your Handicap Index® is the average of your best 8 Score Differential™ values from your most recent 20 scores. When you post hole by hole, TheGrint applies net double bogey and the Course Rating™ and Slope Rating™ of your tees for you. The USGA® calculates an official Handicap Index each night; without one, TheGrint shows an estimate.
This guide explains what happens to each score you post, why your handicap can go up in a slump or stay put after a great round, what a PCC adjustment of +3 means, and how often you should expect to shoot your handicap.
For the arithmetic by hand, see how to calculate a golf handicap. To let the app do it, post your next round in TheGrint.
Every score you post goes through the same steps, whether the number at the end is an official Handicap Index or an estimate.
You can look up the Course Rating and Slope Rating for every set of tees in TheGrint's golf course directory, and read what slope means for how the two Ratings work.
It is if you link one or buy one. In the United States, an official Handicap Index comes through the USGA and your Allied Golf Association. TheGrint is a licensed data affiliate of the USGA, so you can link a GHIN® number you already have or buy a Handicap ID inside the app.
To get the official number, see how to get an official golf handicap.
Your handicap can rise after an ordinary round because it depends on which 20 scores are in your record, not only on the score you just posted. Each new score pushes the oldest one out.
Here is an example. Say your best 8 differentials average 12.0, and the oldest of your 20 is a 9.4, one of those 8. You post a round with a differential of 15.0. The 9.4 drops out, your ninth-best of 13.4 joins the best 8, and the average rises by (13.4 − 9.4) ÷ 8 = 0.5, to 12.5.
On an official record, the soft cap and hard cap limit how far a Handicap Index can rise above your Low Handicap Index from the past 365 days, so a long slump can only push it up so far.
A great round lowers your handicap only if its Score Differential beats your current eighth-best, and only by a share of the gap. Common reasons the number didn't move as much as you hoped:
A very good round can also trigger an exceptional score reduction on an official record. A Score Differential 7.0 to 9.9 strokes lower than your Handicap Index takes 1.0 off your most recent 20 differentials, and 10.0 or more takes 2.0. In TheGrint, that round is marked with an E.
Less often than most golfers think. The USGA calls your Course Handicap™ plus par your "target score" and says that "players shoot their target score about 15-20 percent of the time and can expect to shoot 2-5 strokes higher in most rounds" (USGA: Setting a Target for Your Round).
That is by design. In the same article, the USGA says "Your Handicap Index measures your demonstrated ability when you're playing well." Because only your best 8 of 20 count, most rounds land above it.
TheGrint shows the other end of your game, too. The Anti-Handicap averages your 8 highest differentials from your last 20 instead of your 8 lowest. The gap between the two shows how consistent you are. It is a TheGrint performance metric, not an official handicap.
A PCC of +3 means the course played much harder than expected that day, so every Score Differential from that course was worked out as if each score were 3 strokes lower.
The playing conditions calculation runs once at the end of each day: the system checks whether scores were "significantly higher or lower than the expected scores of the players who made them" and, if so, applies "a PCC adjustment between -1 and +3" (USGA: World Handicap System FAQs).
On a linked official record, TheGrint marks a score with an X when a PCC adjustment was applied. See what the letters on your scorecards list mean, and why an 83 can count when an 82 doesn't.
TheGrint keeps your handicap, your scorecards and the math behind them in one place.
More on the basics: what a golf handicap is and how it works and handicaps on TheGrint.
When you post a round hole by hole, TheGrint caps each hole at net double bogey and turns the round into a Score Differential using the Ratings of your tees. A Handicap Index is the average of the best 8 differentials from your most recent 20 scores. Official records are calculated by the USGA each night; otherwise TheGrint shows an estimate.
Because a good score left your most recent 20. Each new score pushes the oldest one out, and if that old score was one of your best 8, the next-best differential takes its place in the average. Your new round does not have to be bad for the number to rise.
About one round in five or six. The USGA says players shoot their target score, their Course Handicap plus par, about 15 to 20 percent of the time and shoot 2 to 5 strokes higher in most rounds. A Handicap Index reflects how you play on a good day, not your average.
It means the course played much harder than expected that day, so the handicap system adjusted every Score Differential from that course as if each score were 3 strokes lower. The playing conditions calculation runs once at the end of each day and ranges from -1 to +3. On most days it is 0.
Only if you link a GHIN number or buy a USGA Handicap ID in the app. Those official records are calculated by the USGA and shown in TheGrint with one decimal. Without one, TheGrint shows an estimated handicap from the scores you post, which is useful with friends but is not a Handicap Index.
Post your next round hole by hole in TheGrint and net double bogey and your Score Differential are worked out for you, with free GPS distances on the same scorecard. When you want the official number, link your GHIN number or buy the USGA Handicap ID inside the app (U.S.). Get started with TheGrint.
Handicap Index®, Low Handicap Index™, Score Differential™, Course Handicap™, Course Rating™ and Slope Rating™ are trademarks owned or licensed by the United States Golf Association® (USGA®) and/or The R&A. GHIN® is a registered trademark of the USGA. All rights reserved.
