Quick answer: There are four kinds of USTA NTRP rating and they behave completely differently. A self-rating (S) is the one you give yourself when you have never played league. A computer rating (C) is generated at year end from your actual results. A dynamic rating is recalculated after every single match, to the hundredth, and is never published. An appealed rating (A) is one you asked to move. The rule that catches people out: a self-rated player who produces three dynamic ratings clearly above their level in one rating year is dynamically disqualified — the USTA calls those "strikes", and "at least three strikes will result in a Dynamic Disqualification." Your position and whether you won are not inputs; the score and the ratings of your partner and opponents are.
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Introduction
Almost every argument in league tennis about ratings is really an argument about mechanics — how the number is produced, what feeds it, and what happens when it is wrong. Very little of that is guesswork: the USTA publishes it in a FAQ that is thorough and specific and that hardly anyone reads.
This guide quotes that FAQ directly. Where the USTA leaves something undefined, this guide says so rather than filling it in, because the folk knowledge around ratings is dense with confident claims that have no source. If you want the ladder itself — what a 3.0 is versus a 3.5 — that is a separate guide: NTRP ratings explained.
The four ratings, and which one you have
Self-rating (S)
What you assign yourself before you have a computer rating. It is the entry path into league play and it is the one under the most scrutiny, because it is the only rating a player chooses.
Computer rating (C)
The USTA defines it as "a player's rating generated by their participation in USTA League Adult Divisions 18 & Over, 40 & Over, or 55 & Over, and other play as applicable during the course of the rating year." It is also called a year-end rating. This is the number that appears next to your name for the following season.
Dynamic rating
The engine underneath everything. "A Dynamic Rating is generated at the conclusion of a player's most recently completed USTA League Adult and/or Mixed Division match. Dynamic Ratings are calculated to the hundredths of a point and are not published. A Dynamic Rating may be calculated after each match and it may change with each match played."
So it updates constantly, it is precise to two decimal places, and you cannot see it. Every rumour you have heard about someone "being at 3.49" is somebody's inference, not a published figure.
Mixed rating (M)
The one most people have never heard of. "A Mixed Rating is generated by a player who only participates in USTA League Mixed Division(s) and does not have a valid computer year-end rating." Play at least three matches in an Adult Division and you generate a Computer Rating instead.
Appealed rating (A)
"A player receives an Appealed Rating when they are granted a request to play at a higher or lower level of play." The FAQ lists three kinds: medical appeals, automatic appeals, and committee reviewed appeals.
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What actually feeds the calculation
This is where most of the folklore is wrong, and the USTA is unusually direct about it.
What goes in: "Computerized ratings are affected by the score of a match as well as the dynamic ratings of a player's partner and the player's opponents. Based on player dynamic ratings at the start of a match, the NTRP algorithm expects a particular outcome of a match. The actual outcome is then compared to the expected outcome, and as a result of this comparison, the player's dynamic rating is adjusted up or down (or there is no change, if the outcome was as expected)."
What does not go in, quoted verbatim: "Computerized ratings are not directly affected by what position a player played, whether the player won or lost, age, or team standing."
Read that again, because four common beliefs die in one sentence. Playing line one does not raise your rating. Winning does not raise it. Losing does not lower it. Your team finishing top of the division does nothing.
What this means in practice
The algorithm has an expectation before you walk on court, built from four dynamic ratings — yours, your partner's and both opponents'. Your rating moves according to how the score compared with that expectation. A narrow loss to a much stronger pair can move you up. A 6-0 6-0 win over a much weaker pair can leave you exactly where you were, because that is what was expected.
This is also why "I went 8-2 and didn't get bumped" is not evidence of anything. Ten wins against the outcomes the algorithm already predicted produce no movement at all.
Dynamic disqualification, and the three strikes
The rule that ends more seasons than any other, and the reason self-rating honestly matters.
The USTA: "An NTRP Disqualification is a rule enforcement against a self-rated or appealed player who is generating dynamic ratings high enough to indicate the player is playing at a level that is too low for their ability. Dynamics indicating a player is out of level are called 'strikes,' and at least three strikes will result in a Dynamic Disqualification."
More precisely: "A Dynamic disqualification is defined as a self-rated player that has generated three dynamic ratings in a single rating year based on USTA League Adult Division play… that are clearly above their current computer-rating level."
Two details worth noticing. It applies to self-rated and appealed players — not to everyone. And retirements, and matches from Sectional Championships onward, are excluded from the count.
The lag that surprises people
Here is an under-appreciated one: "Matches played against players that are self-rated do not generate dynamic ratings until a self-rated player has enough results from matches against other players who have Dynamic Ratings."
In other words, early-season matches between two self-rated players are effectively invisible to the algorithm until enough other data exists to anchor them. A self-rated player can therefore accumulate strikes retroactively, which is exactly why disqualifications tend to land mid-season rather than in week one.
What to do if your level is not offered locally
A practical section straight from the FAQ, which lists six options for a player whose level has no local league:
- Play up one level.
- File an appeal to determine if they are within the appeal range.
- Work with the local or district league coordinator to establish a new league at that level.
- Play in a league that offers combined ratings.
- Play USTA NTRP sanctioned tournaments.
- Play in an Adult Social League offered in the area.
Playing up is the USTA's own first suggestion, which is worth knowing if your club treats it as a slightly irregular request.
Appeals: three kinds, and what each one is for
The FAQ names three appeal types — medical, automatic, and committee reviewed — and describes an appealed rating simply as one granted "when they are granted a request to play at a higher or lower level of play."
Two things follow that are worth stating plainly. First, appeals run in both directions: the mechanism exists as much for a player whose level has no local league as for one who thinks the algorithm has them wrong. Second, an appealed rating carries the same disqualification exposure as a self-rating — the USTA's disqualification definition covers "a self-rated or appealed player". Winning an appeal down does not put you outside the strike system; it puts you inside it.
The specific appeal ranges and the committee process vary by section, and this guide does not quote numbers for them because the national FAQ does not publish them. Your section's league regulations are the document that governs, and your local league coordinator is the person who has it.
What third-party rating sites can and cannot know
Several sites publish what they present as live NTRP numbers, and it is worth being precise about what those are.
Published match results are public. Dynamic ratings are not — the USTA states they "are not published". So a third-party site is running its own reconstruction of the algorithm against public scores. That can be informative and it is often roughly right, but it is an estimate of a hidden number, and it does not have access to the two things that matter most: the actual dynamic ratings the algorithm used as inputs at the start of each match, and the strike thresholds.
The practical consequence: a third-party site telling you that you are "at 3.47" is telling you what its model produced, not what the USTA holds. It is a reasonable thing to be curious about and a poor thing to make a season's decisions on.
Common questions
Does winning matches raise your NTRP rating?
Not directly. The USTA states that computerised ratings "are not directly affected by what position a player played, whether the player won or lost, age, or team standing." What moves the number is the difference between the actual score and the score the algorithm expected from the four players' dynamic ratings.
What is a dynamic disqualification and how many strikes does it take?
Three. The USTA defines a strike as a dynamic rating "clearly above" the player's current computer-rating level, and says "at least three strikes will result in a Dynamic Disqualification." It applies to self-rated and appealed players, and excludes retirements and play from Sectional Championships onward.
Can I see my dynamic rating?
No. The USTA is explicit that dynamic ratings "are calculated to the hundredths of a point and are not published." Anything presenting itself as your live dynamic number is an estimate produced by a third party from published match results.
Do playoff and championship results count toward my year-end rating?
Yes. Asked directly whether district, sectional or national championship results are included, the USTA answers that "Advancing Championship and National Championship play is included in the calculation of the algorithm."
Sources
Everything quoted above is from the USTA's own page, which returned successfully when this guide was written:
One deliberate omission: this guide does not tell you what dynamic-rating number corresponds to a strike, because the USTA does not publish it. "Clearly above their current computer-rating level" is the whole of the published definition, and any specific threshold you have seen quoted is somebody's reconstruction.
The short version
Four rating types, one hidden engine, and an algorithm that cares about the score relative to expectation rather than about winning. If you self-rate, self-rate honestly — three strikes in a rating year ends the season, and the strikes can arrive retroactively once the data catches up.
For what the levels themselves mean, read NTRP ratings explained. For what you can wear once you are on court, the USTA League dress code guide covers what the rulebook actually says, and the USTA league apparel range is what we build for match day.
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