Basketball · The NBA’s aprons · 1984 – today

The ladder

The NBA has a soft cap. It did. Every tool a team can use to add a player, the exact line at which each one stops existing — and the point, reached in 2023, where the list runs out and a soft cap becomes the hardest ceiling in American sport.

Every NBA salary-cap exception, and where each one dies

The full exception list priced for 2026-27: Bird rights, the $15.044M and $6.064M mid-levels, the $9.366M room exception, the $5.477M bi-annual, sign-and-trade, salary aggregation, trade exceptions and cash — and the exact line at which each stops existing.

Over the cap, an NBA team cannot simply sign a player. It has to name the mechanism it is using, and the mechanism has to be one the collective bargaining agreement provides. That is what makes the system countable — and what makes the aprons possible, because a rule that removes a named mechanism is much easier to write than one that caps spending.

Below is the whole list, priced for 2026-27. Choose a band to see what a team sitting there may still reach for; the rows never move, they only go dark.

Every NBA roster-building tool, its 2026-27 value and the line at which it stops being usable.
Tool	Kind	2026-27	Dies at	Hard-caps you at
Cap room	cap room	—	the cap	—
The room exception	cap room	$9,366,000	the cap	—
The non-taxpayer mid-level	exception	$15,044,000	the first apron	the first apron
The bi-annual exception	exception	$5,477,000	the first apron	the first apron
Acquiring by sign-and-trade	trade	—	the first apron	the first apron
The mid-level in a trade or claim	trade	—	the first apron	the first apron
The buyout market	exception	—	the first apron	—
Taking back more than you send	trade	—	the first apron	the first apron
Last year’s trade exception	trade	—	the first apron	the first apron
The taxpayer mid-level	exception	$6,064,000	the second apron	the second apron
Aggregating salaries in a trade	trade	—	the second apron	the second apron
Cash in a trade	trade	—	the second apron	—
Matching with a signed-and-traded player	trade	—	the second apron	—
A sign-and-trade trade exception	trade	—	the second apron	—
Minimum contracts	exception	—	never	—
Bird rights	exception	—	never	—
The draft	asset	—	never	—
An even trade	trade	—	never	—

“Dies at” — the line above which the tool cannot be used at all“Hard-caps you at” — the ceiling using it fixes for the rest of the league year

Every tool, in words

Grouped by the line each one dies at, from the bottom of the ladder upward.

Requires cap room2

Cap room: The only tool that is not an exception, and the only one most other sports have. It is also the rarest: a team has room only if it has stripped its books down to less than the cap, cap holds and all, which usually means letting its own free agents go. Most NBA teams spend most seasons with no cap room whatsoever and are none the worse for it — which is the first clue that the cap is not a budget.
The room exception$9.37M: Spend your room down to nothing and you may still add one more player with this. It exists so that a team which has used cap space is not left with only minimum contracts, and it is smaller than the mid-level available to a team that never had room at all — the system’s standing preference for staying over the cap.

Dies at the tax linenothing

Not one tool stops at the luxury-tax line. This is the single fact the guide is built around: the most famous line in the NBA’s finances is a price, and prices do not constrain anyone who is willing to pay them. The Golden State Warriors paid $170,331,194 in tax in 2021-22 and kept every exception they had.

Dies at the first apron7

The non-taxpayer mid-level$15.04M: The most valuable tool in the middle of the ladder, and the clearest illustration of the trap door: a team under the first apron may use it, but the act of using more than the taxpayer share hard-caps that team at the first apron for the rest of the league year. You may reach for it from below. You may not reach for it from above. And reaching for it closes the door behind you.
The bi-annual exception$5.48M: Available to a team over the cap but under the first apron, and only in alternate seasons — use it this year and it is gone next year. Like the full mid-level, using any part of it hard-caps the team at the first apron.
Acquiring by sign-and-trade: The mechanism that lets a player leave for more money than his new team could otherwise offer, and the old team collect something rather than nothing. It is the oldest apron casualty: the 2011 CBA’s first restriction, in force from 2013-14, was that a team more than $4M over the tax line could no longer receive a player this way.
The mid-level in a trade or claim: The mid-level is usually thought of as a signing tool, but it can also swallow an incoming contract in a trade or a waiver claim. Above the first apron it cannot be used this way at all, at any size — including the taxpayer portion that is still available for signings.
The buyout market: Every February a handful of good players are waived by bad teams and choose their next club. Above the first apron you may not sign any of them whose pre-waiver salary exceeded the non-taxpayer mid-level — the rule exists so that the richest rosters cannot restock for free from the wreckage of the poorest. It is the only restriction here that binds in the middle of the season rather than in July.
Taking back more than you send: An over-the-cap team trades by matching salaries within a band, and below the first apron that band lets it take back more than it sends. Above the first apron the band closes to 100%: every trade must be salary-neutral or salary-shedding. A team over the first apron can still improve by trade — but only by getting better, never by getting bigger.
Last year’s trade exception: Send out salary without taking any back and you are left with a trade exception — a credit, good for a year, that lets you absorb a contract later without matching. Above the first apron a credit created in a previous league year cannot be spent, so the most patient version of this tool is exactly the one denied to the teams most likely to have banked it.

Dies at the second apron5

The taxpayer mid-level$6.06M: The smaller mid-level, and the last exception on the ladder. A team between the aprons may still sign a rotation player with it; above the second apron it is gone, and with it the last way to add a player worth more than the minimum from outside the building. Using it hard-caps a team at the second apron.
Aggregating salaries in a trade: The single most consequential loss, and the one that dismantles teams. Adding a star by trade almost always means sending out several smaller contracts to match his; a team above the second apron may not add them together, so it can only trade a player for a player of comparable salary. Three good rotation players cannot become one great one. That is the rule that turns a title roster into a fixed asset.
Cash in a trade: Cash is how a team pays another to take an unwanted contract, or buys a second-round pick. Above the second apron it cannot send any, which removes the cheapest lubricant in the trade market from precisely the teams most in need of it.
Matching with a signed-and-traded player: The other half of the sign-and-trade. A team above the second apron may still send a free agent out this way, but cannot use his outgoing salary to match anything coming in — so the transaction can only ever shrink the roster.
A sign-and-trade trade exception: The credit a sign-and-trade leaves behind is unusable above the second apron. Together with the rule above, it means a second-apron team that loses a free agent in a sign-and-trade gets picks or nothing — never the room to replace him.

Survives everything4

Minimum contracts: The floor of the system and the one door that never closes. However far over the second apron a team is, it may always add a player at the minimum — which is why the rosters of the most expensive teams in the league fill up, every February, with veterans on minimum deals. It is also why those teams get worse: the minimum is what you have left when everything else is gone.
Bird rights: The exception that made the cap soft in the first place, and the one the aprons never touch. A team may exceed the cap — and the tax, and both aprons — to keep a player it already has, provided he has been under contract long enough to qualify. Everything expensive about the NBA follows from this: teams do not get over the cap by signing other clubs’ players, they get there by keeping their own. Early Bird and Non-Bird rights are the same tool with shorter service and smaller limits.
The draft: A first-round pick’s salary is fixed by a published scale and can be added over any line. It is the only way a second-apron team can add a genuinely good player cheaply — and it is also what the second apron threatens, because a team over that line at season’s end has its first-round pick seven years away frozen, and loses it to the end of the round if it stays over.
An even trade: Not an exception at all, but worth naming, because it is what remains of the trade market above the second apron: one salary out, no more salary in, no aggregating, no cash. Teams in that position trade like a chess player down to a king and a rook — every move has to be an exchange.

And one thing that is not a tool

The second apron does not only take mechanisms away; it reaches into the draft. A team over the second apron at the end of the regular season has its first-round pick seven drafts away frozen: it cannot be traded. If that team is over the second apron again in two of the following four seasons, the frozen pick drops to the end of the first round, whatever its record. A team that stays under the second apron in three of the four subsequent seasons gets the pick back.

It is the longest sentence in the system — a penalty imposed on a team seven years after the payroll that earned it, by which time every player involved will have moved on. That is deliberate. A fine can be paid by an owner willing to spend; a pick taken out of 2033 cannot be paid by anybody.