Table tennis serving rules.

The table tennis serve is arguably the most heavily regulated serve in any racket sport. Where tennis lets you toss and strike with almost any motion, and badminton simply requires the shuttle to be below 1.15 metres, table tennis governs the palm position, the toss height, the toss direction, the striking moment, the ball's visibility, and the position of your free arm — all in a single, compact motion that takes less than two seconds.

The reason for this regulatory density is historical. In the early decades of competitive table tennis, players developed serves with extreme hidden spin. By concealing the point of contact between the racket and the ball — using their free hand, their torso, or a deceptive wrist flick hidden behind the arm — servers could generate spin that was virtually invisible to the opponent. The receiver had no idea whether the ball was carrying topspin, backspin, or sidespin until it bounced, and by then it was too late to adjust. The serve became an almost unbeatable weapon.

The International Table Tennis Federation (ITTF) responded with a series of rule changes over the decades — the open-palm requirement, the 16-centimetre minimum toss, the visibility requirement, the free-arm removal rule — all designed to make the serve fair and returnable. Today's serve rules are the result of that long evolution, and understanding them is essential for playing table tennis correctly at any level.

The serve begins with the ball resting on the free hand — the hand not holding the racket. The rules governing this toss are precise and strictly enforced at the competitive level.

• — The ball must rest on a flat, open palm. The hand must be open with the fingers together and the thumb free — the ball cannot be cupped, gripped, or pinched between the fingers.
• — The free hand must be above the level of the playing surface at the start of the serve. You cannot toss the ball from below the table.
• — The ball must be projected near-vertically upward at least 16 centimetres (approximately 6 inches). The toss must be close to vertical — not thrown forward, sideways, or at a steep angle.
• — The ball must not be spun during the toss. The free hand must release the ball cleanly without imparting rotation. Any spin must come from the racket at the moment of contact, not from the toss.
• — The ball must be struck only after it has reached the peak of the toss and is on the way down — the descending phase. You cannot hit the ball while it is still rising.

The 16-centimetre minimum toss height serves two purposes. First, it ensures the opponent has time to see the ball and prepare for the serve. Second, it prevents "quick flick" serves where the ball is barely released before being struck, which would be almost impossible to read. In practice, most competitive players toss the ball significantly higher than 16 cm — often 30 to 50 cm — because a higher toss gives them more time to set up the racket angle and generate spin.

The open-palm rule is the first thing most recreational players get wrong. In casual play, people routinely toss the ball from a closed fist or from between their fingers. This is technically a fault. The ITTF requires the palm to be flat and open so that the umpire and the opponent can clearly see the ball at all times during the toss phase — there is no hidden space where spin could be secretly applied.

Once the ball has been tossed at least 16 cm and has reached the peak of its arc, the server must strike it as it descends. The striking rules govern what happens next.

• — The ball must be struck only while descending — after the peak of the toss. Hitting the ball on the way up is a fault.
• — The ball must first bounce on the server's side of the table. If the ball goes directly over the net without touching the server's side, the serve is a fault.
• — After bouncing on the server's side, the ball must pass over or around the net assembly and bounce on the receiver's side of the table.
• — The ball can travel around the net — the net assembly extends past the table edges via the posts and clamps, but the ball is allowed to curve around the outside of the posts and still be legal.
• — The serve must be made from behind the end line of the table. The ball must be behind the end line and above the table surface at the moment of contact.

The "bounce on the server's side first" rule is unique to table tennis among major racket sports. In tennis, the serve goes directly over the net. In table tennis, the ball must hit the server's half first, creating a distinctive double-bounce trajectory. This double-bounce requirement limits the speed and angle of the serve, because the ball has to clear the net after bouncing up from the server's side — a natural governor on serve aggression.

The rule about hitting the ball on the descent (not the ascent) exists to prevent "snap" serves. If players could hit the ball at the very top of the toss — or worse, on the way up — the timing would be nearly impossible for the receiver to read. By requiring the descending phase, the rules give the receiver a predictable rhythm: toss, peak, descent, strike. This window, combined with the visibility rules, ensures the receiver always has a realistic chance of returning the serve.

The visibility rules are the most distinctive feature of table tennis serving, and they exist for one reason: to prevent hidden-spin serves. These rules are strictly enforced in ITTF-sanctioned competition and are the most common source of service faults at the professional level.

• — The ball must be visible to the opponent at all times from the moment the serve begins until the ball is struck. You cannot position your body between the ball and the opponent to block their view.
• — The ball must be visible to the umpire at all times. In competition, the umpire sits to the side and needs a clear sightline to the ball throughout the serve.
• — As soon as the ball is projected (tossed), the free arm and hand must be removed from the space between the ball and the net. You cannot leave your free hand hovering in a position that obscures the opponent's view of the racket and ball at the moment of contact.
• — The server cannot use any part of their body or clothing to hide the ball or the point of contact.

These rules were the ITTF's direct response to the "hidden serve" era, when top players developed techniques to mask the spin on the ball by hiding the racket's contact point behind their free arm or torso. A server could generate heavy backspin with one wrist motion and heavy topspin with an almost identical motion, and if the opponent could not see the racket face at the moment of contact, they had to guess — and guessing at the elite level is losing.

The practical effect for recreational players is simple: after you toss the ball, move your free hand out of the way immediately. Do not leave it hovering near the ball. Do not turn your body to shield the serve. Keep your torso facing the table, toss the ball up and to the side of your body, and strike it in plain view. If the opponent can see the ball and the racket at the moment of contact, you are in compliance.

Table tennis has an unusual serve placement rule that surprises many players: in singles, there is no diagonal requirement. You can serve anywhere.

• — In singles: the serve can land anywhere on the receiver's half of the table. There is no restriction to a specific quadrant or box. The ball bounces on the server's side, crosses the net, and lands anywhere on the opponent's side.
• — In doubles: the serve must go diagonally — from the server's right half-court to the receiver's right half-court. The table is divided by a white centre line for this purpose.
• — The server must be positioned behind the end line of the table at the moment of contact. The end line is the short edge of the table on the server's side.
• — The ball must be above the table surface at the moment it is struck — you cannot serve from below table height.

The freedom to serve anywhere in singles is a major tactical element. Unlike tennis, where you must target a specific service box, table tennis lets you vary your serve placement infinitely — short to the net, long to the end line, wide to the forehand, wide to the backhand, or straight at the opponent's body. Combined with the variety of spins available (topspin, backspin, sidespin, no-spin), the serve placement creates an enormous number of possible combinations that keep the receiver guessing.

The most effective recreational serves tend to be short serves that bounce twice on the opponent's side (forcing them to reach over the table and preventing them from making a big swing) and deep serves with heavy spin that push the opponent away from the table. The best servers mix these constantly to prevent the receiver from settling into a rhythm.

A let serve in table tennis is simple: the ball is served legally, bounces on the server's side, clips the net assembly (the net, posts, or clamps), and still lands on the receiver's side of the table. The serve is replayed with no penalty.

• — Ball clips the net assembly and lands on the receiver's side = let, replay the serve.
• — There is no limit to the number of consecutive lets. Five, ten, twenty in a row — all replayed.
• — The let does not affect the service count. If you were on your first of two serves, you still have both serves remaining after a let.
• — If the ball clips the net and does NOT land on the receiver's side (it falls back on the server's side or off the table), it is a fault, not a let.
• — A let can also be called for other reasons — for example, if the receiver was not ready, or if play is interrupted by an external disturbance.

Let serves are more common in table tennis than in most other racket sports because the net is only 15.25 centimetres (6 inches) high and the ball passes very close to it on most serves. In recreational play, you will hear "let!" called fairly frequently. In competitive play, the umpire makes the call.

The table tennis let serve rule is straightforward compared to some other sports. Unlike pickleball (which abolished lets entirely in 2021), table tennis has always replayed net-cord serves and shows no sign of changing. The net is too low and the ball too small for a net-cord serve to produce a fair outcome, so the replay makes sense.

Table tennis uses a distinctive service rotation system. Each player serves two consecutive points, then the service passes to the other player for two points, and so on throughout the game. This is different from tennis (where one player serves an entire game) and from badminton (where the server keeps serving until they lose a rally).

• — Each player serves 2 consecutive points. After 2 points, the service switches to the opponent.
• — At deuce (10-10 or any tied score after 10-10), the service alternates every single point instead of every 2. This increases the pressure and prevents either player from building momentum on their serve.
• — The serving order is fixed at the start of each game. In the next game, the player who received first in the previous game serves first.
• — In doubles, the rotation is A1 serves 2 points to B1, then B1 serves 2 points to A2, then A2 serves 2 points to B2, then B2 serves 2 points to A1, and the cycle repeats.

The two-serve system creates a natural rhythm in table tennis. You always know how many serves you have left in your turn, and you can plan your serve strategy accordingly — perhaps a heavy backspin serve followed by a no-spin "dead" serve that looks identical. The two-serve limit also prevents one player from building up a long run of service points, which keeps the game competitive and fast-moving.

The deuce rule — alternating every single point at 10-10 — is one of the most exciting parts of table tennis. Each player gets only one serve at a time, which means every serve is high-pressure. There is no safety of knowing you have a second serve coming. This rule accelerates the tension at the end of close games and is one reason why table tennis deuce rallies are so thrilling to watch.

In doubles table tennis, the serve must travel diagonally — from the server's right half-court to the receiver's right half-court. This is the only placement restriction in table tennis serving, and it applies exclusively to doubles.

• — The ball must bounce on the server's right half of the table first, then cross the net and bounce on the receiver's right half. The white centre line on the table defines the halves.
• — A ball that touches the centre line is considered to be on both halves — it is legal.
• — After the serve is returned, the diagonal restriction no longer applies. Any player on the receiving team can return the ball to any part of the table.
• — The players must take turns hitting the ball during the rally — A1 serves, B1 returns, A2 hits, B2 hits, A1 hits, and so on. Missing your turn is a fault.
• — The serving rotation in doubles cycles through all four players: A1 → B1 → A2 → B2 → A1, with each player serving 2 points before the rotation advances.

The doubles diagonal serve rule exists to create a structured start to the rally. Without it, the server could target the weaker receiver's partner directly, which would remove the alternating-hits requirement's balancing effect. By forcing the serve into a specific quadrant, the rules ensure that the designated receiver has a fair chance to make the return.

One subtle point: after the serve is returned, the alternating-hits rule means that the server's partner — not the server — must make the next shot. This forces both players on each team to be actively involved in every rally, which is one reason doubles table tennis is so fast-paced and requires exceptional coordination and footwork.

A quick-reference checklist of everything that constitutes a service fault in table tennis. Any of these will give the point to the opponent.

• — The ball is not tossed at least 16 cm vertically upward.
• — The ball is struck while still ascending (before reaching the peak of the toss).
• — The ball is tossed from a cupped or closed hand instead of a flat, open palm.
• — The ball is spun during the toss (spin must come from the racket, not the toss).
• — The ball is hidden from the opponent or the umpire during any part of the serve.
• — The free arm is not removed from the space between the ball and the net after the toss.
• — The ball does not bounce on the server's side of the table before crossing the net.
• — The ball does not land on the receiver's side of the table after crossing the net.
• — The ball is struck from in front of the end line (must be behind the end line).
• — The ball is below the table surface at the moment of contact.
• — In doubles, the ball does not travel from the server's right half to the receiver's right half.
• — The toss is not near-vertical (thrown forward, sideways, or at a steep angle).

In ITTF-sanctioned competition, the umpire will typically issue a warning for a first service fault if they believe the server made an honest mistake (especially on visibility violations). Subsequent faults result in the point being awarded to the opponent. In recreational play, service rules are often enforced loosely, but understanding the correct technique will make you a better player and prepare you for any competitive setting.