$11,991,268 Of The 49ers' Cap Space Depends On Which Book You Open
Over The Cap publishes $68,055,498. Spotrac publishes $80,046,766. Both rank San Francisco first in the NFL, both close to the dollar against their own stated fields, and the distance between them breaks into five lines that sum exactly. Every one of those numbers is an offseason number, and the offseason ends in four dated stages between Sunday evening and September 10, only the last of which moves it.
Look up how much money the 49ers have to spend and you get two answers.
Over The Cap says $68,055,498. Spotrac says $80,046,766. Both were read Thursday morning. Both rank San Francisco first in the NFL. Neither is wrong, and the $11,991,268 between them is not a rounding artifact or a stale page. It is five specific accounting decisions, and they add up exactly.
What each book actually says#
These are stated fields, copied off each site's own summary rather than computed.
| Over The Cap | Spotrac | |
|---|---|---|
| Cap limit | $340,563,099 (derived) | $341,170,524 (stated) |
| Charges against it | $272,507,601 | $261,123,758 |
| Cap space | $68,055,498 | $80,046,766 |
| League rank | 1st | 1st |
| Dead money | $36,470,796 | $36,817,740 |
| Injured reserve | $5,604,563 | $5,604,563 |
| Contracts on the books | 97 | 90 active, plus five on injured reserve |
One line there is mine rather than theirs. Over The Cap does not print a cap limit, so it comes from the formula the site publishes on its own cap-space page: cap space equals team salary cap less active cap spending less dead money. Run backwards, that puts the limit at $340,563,099. Spotrac states its own and shows the build: a $301,200,000 league cap, $19,313,885 of 2025 rollover and a $20,656,639 adjustment, summing to $341,170,524.
Both books close internally. Spotrac's $341,170,524 less its $261,123,758 of allocations is $80,046,766 to the dollar. The 92 active rows on Over The Cap's roster table sum to $274,221,816, and its five injured-reserve rows sum to $5,604,563, matching its stated total.
The gap breaks into five lines and they sum exactly#
One line is nine tenths of the disagreement, and it is the one neither book explains
The five components of the $11,991,268 difference between Spotrac's and Over The Cap's published 49ers cap space, read Thursday, August 27, 2026. Bars are scaled against a common axis of $15,000,000. Four of the five push in the direction of Spotrac showing more room; the pricing line pushes the other way and is larger than the rest combined.
Start with $607,425, which is the whole disagreement about how big the cap is. That is the smallest thing on this list and it is worth stating first, because it is the part most readers assume is the story. It is four tenths of one percent of the two books' cap limits. They agree almost perfectly on the size of the pot.
Then $2,185,000 of injured reserve. Both books hold the identical figure, $5,604,563 across five men. They charge it differently. Spotrac lists injured reserve as its own line and charges all of it. Over The Cap folds those five into the same pool the top 51 is drawn from, where they have to outbid a healthy player for a slot. Only one does. Ricky Pearsall's $3,419,563 makes the 51 and displaces Brayden Willis at $1,145,000. The other $2,185,000 of injured reserve costs Over The Cap's sheet nothing at all.
That is checkable rather than asserted. The top 51 charges on Over The Cap's active table sum to $233,762,242. Swap Willis out and Pearsall in and you get $236,036,805, which is the site's published active spending figure, exactly.
Then $885,000 for Isaac Alarcon, who holds an international exemption. Spotrac carries him on a line of his own. Over The Cap's cap-space formula has two terms and neither is named for him.
Then $346,944, which is all the two books disagree about on dead money against totals near $36.5 million.
The line that is nine tenths of it#
Which leaves $14,800,787, and it is not a convention. It is the two books pricing the same players differently.
The largest single piece of it has a name. Spotrac carries Trent Williams at a 2026 cap number of $22,512,842. Over The Cap carries him at $20,012,845. That is $2,499,997 on one left tackle, and the two books were the same $2,499,997 apart on him when they were read on August 8, so the difference has held for 19 days.
Two other things about that line are worth having. The books are not sloppy: Nick Bosa is $22,990,989 on one and $22,990,988 on the other, a difference of one dollar. And they are not counting the same men. Over The Cap works from 97 contracts, Spotrac from 90 on its active table plus five on injured reserve. A disagreement about who belongs in a top 51 moves the total without either side mispricing anybody.
What the $14,800,787 is made of beyond Williams, this cannot say. Closing it needs a row-by-row comparison of both books at every one of roughly a hundred contracts, which has not been done here. It is a measured quantity with one named component and an unexplained remainder, and it should be read that way.
Both numbers are offseason numbers#
Spotrac labels the section those figures live in "TOP-51 / OFF-SEASON CAP." That label is doing more work than it looks like.
From the start of the league year until the regular season begins, only a club's 51 largest cap charges count. It is what lets a team carry 90 bodies through August without 90 cap hits. When the regular season starts it flips to full accounting, and everybody counts: the whole active roster, the practice squad, injured reserve, reserve/PUP, dead money.
So the number ends in stages rather than on a date. Four dated moments sit between now and then, and only the last one moves it.
| When | What happens | Does the cap number change |
|---|---|---|
| Sunday, August 30, 6:00 p.m. ET | Rosters cut to 53 | No. The top-51 rule is still on |
| Monday, August 31, 1:00 p.m. ET | Waiver claims settle | No |
| Monday, August 31, 6:00 p.m. ET | Practice squads reported, 16 men, 17 with an international player | No |
| Thursday, September 10 | San Francisco opens against the Rams in Melbourne | Yes. Full accounting |
The cut everybody watches on Sunday does not move the published number. The flip comes 10 days later.
What the flip costs, and it is less than the argument#
Three things get added. Two contracts that are currently the 52nd and 53rd charges begin to count, which at today's ranking is Jalen Graham at $1,145,000 and Jordan James at $1,114,921, or $2,259,921. A practice squad of 16 begins to count, at $247,500 a man for the season at the young rate and $330,300 to $411,300 for the veterans, of whom a club may carry six. That is $3,960,000 if all 16 are young and $4,942,800 at the most expensive legal mix.
And releasing people costs money. Take the 39 men who currently sit outside Over The Cap's own top 53 by cap number and release exactly them, and the dead money is $3,622,611. Twenty-five of the 39 carry none at all; the largest single charge is Ephesians Prysock at $789,036.
Everything the offseason ending adds is smaller than the gap between the two books
New cap charges that switch on when full accounting begins, against the published disagreement between Spotrac and Over The Cap as it stands today. Bars scaled against a common axis of $12,000,000. The cut scenario assumes San Francisco releases the 39 men currently outside Over The Cap's top 53 by cap number, which is an assumption about price and not a prediction about who plays.
Add them and the whole visible cost of the offseason ending is $9,842,532 to $10,825,332. The two books already disagree by $11,991,268.
That is the finding. The rule change that gets explained every August moves this club's number less than the choice of which website you happened to open.
Which number answers which question#
They are answers to different questions, and neither site is hiding it.
Spotrac's is the operating number. It charges everything the club is actually carrying right now, including the men on injured reserve and the exempt list, and it is the better answer to "how much can John Lynch spend this week."
Over The Cap's is the comparative number. It applies the league's own top-51 convention strictly, which is what makes 32 teams line up against each other on one table.
Both are first in the NFL, which is the part that survives every convention. Second place is Tennessee at $45,407,727, so San Francisco leads by $22,647,771 on the lower of its own two numbers. The league median is $20,442,959. Even in the most expensive version of September modeled here, the smaller number lands near $57,230,166, which would still clear second place today by $11,822,439, which is more than seven clubs hold in total.
What this does not show#
It does not show that either book is wrong. Every figure here is one of theirs, and both close against their own stated fields.
It does not explain $12,300,790 of the $14,800,787 pricing line. Williams accounts for $2,499,997 and the rest is unattributed.
It does not predict the roster. The dead-money figure is a scenario built on releasing the 39 cheapest contracts, and clubs cut on merit, take waiver claims and make trades. The real number will differ and it can only move up if a man with guaranteed money is cut ahead of a man without.
It does not account for reserve/PUP. Isaac Guerendo and Mykel Williams are on that list now, and a player who stays there counts in the regular season without occupying one of the 53. Williams' charge is already inside the top 51, so the effect on the estimate is small, but it is not zero and it is not modeled.
And the $607,425 limit difference is measured, not explained. Its cause sits inside the rollover and adjustment lines, and only Spotrac publishes those.
Called Shots#
Three, all resolving on the same day, all scored by opening two public pages.
One: Over The Cap publishes 49ers cap space below $60,000,000 on September 15, 2026. The estimate here lands between $57,230,166 and $58,212,966 once full accounting is on. Wrong at $60,000,000 or above.
Two: Spotrac's published 49ers cap space still exceeds Over The Cap's by more than $5,000,000 on September 15, 2026. The larger part of the gap is the pricing line, which full accounting does not touch, so most of it should survive the flip. If it collapses instead, the gap was a top-51 artifact and this reading of it was wrong.
Three: the two books still price Trent Williams' 2026 cap number more than $2,000,000 apart on September 15, 2026. It has held at $2,499,997 for 19 days. Whether it survives is the difference between a data-entry difference that gets corrected and a convention difference that does not.
Revisit all three on September 15, 2026.
Both books were read Thursday, August 27, 2026, in a browser rather than through a fetch summary, and the page location and title were echoed and checked on every read. Over The Cap's figures come from its league cap-space table and its 49ers page: cap space $68,055,498, active cap spending $236,036,805, dead money $36,470,796, 97 contracts. Its 92 active rows were summed cell by cell to $274,221,816 and its five injured-reserve rows to $5,604,563. Spotrac's come from its 2026 49ers cap page summary: adjusted cap $341,170,524, allocations $261,123,758, cap space $80,046,766, injured reserve $5,604,563, exempt list $885,000, dead money $36,817,740.
Two figures are derived rather than stated and are labeled as such wherever they appear. Over The Cap's cap limit of $340,563,099 comes from the formula that site publishes on its own cap-space page. Spotrac's top-51 active portion of $217,816,455 is a residual, its allocations less its exempt, injured-reserve and dead-money lines, and the $14,800,787 pricing line depends on it.
Roster and cap rules, the August 30 cutdown at 6:00 p.m. ET, the August 31 waiver and practice-squad deadlines and the 16-man practice squad with a 17th international spot are from the Bengals' club posting of the league deadlines. The 2026 practice-squad rates of $13,750 a week and $18,350 to $22,850 a week over an 18-week season, the $301,200,000 league cap and the rule that top-51 accounting ends when the regular season begins are cross-checked against published cap references and against Spotrac's own labeling of the section. The September 10 opener against the Rams at the Melbourne Cricket Ground is from the club.
The confidence is high on everything stated by the two books and on the arithmetic, which closes to the dollar in both directions. It is lower on the September estimate, which rests on a practice squad that has not been signed, a 53 that has not been named and a cut list assumed by price.
