Zscaler reported $7.37B of remaining performance obligations at 31 Jul 2026, up 27% from a year earlier and up 14% from the previous quarter. That is 2.2 years of trailing revenue already under contract. Book-to-bill last quarter: 2.01.
Net new backlog added in the latest quarter: $906M.
Over the last twelve months it turned about 55% of its opening backlog into revenue (12-month conversion).
45% of the backlog is due within the next twelve months.
Customer prepayments (contract liabilities) cover 33.7% of the backlog.
Twelve-month book-to-bill: 1.47, i.e. 1.47 of new orders for every 1 of revenue recognised.
Backlog growth minus revenue growth: +2 points — orders are running ahead of revenue.
By backlog size it ranks 91st among US filers the cockpit tracks.
Zscaler backlog history
Remaining performance obligations at each quarter end (bars) against trailing twelve-month revenue (line).
Amounts in USD. Source: SEC XBRL filings.
Quarter end
Backlog (RPO)
TTM revenue
Coverage
Customer prepayments
31 Jul 2026
$7.37B
$3.35B
2.2 yrs
$2.48B
30 Apr 2026
$6.46B
$3.17B
2.0 yrs
$2.48B
31 Jan 2026
$6.05B
$3.00B
2.0 yrs
$2.36B
31 Oct 2025
$5.93B
$2.83B
2.1 yrs
$2.35B
31 Jul 2025
$5.78B
$2.67B
2.2 yrs
$2.47B
30 Apr 2025
$4.98B
$2.55B
2.0 yrs
$1.99B
31 Jan 2025
$4.62B
$2.42B
1.9 yrs
$1.88B
31 Oct 2024
$4.41B
$2.30B
1.9 yrs
$1.78B
31 Jul 2024
$4.42B
$2.17B
2.0 yrs
$1.90B
30 Apr 2024
$3.82B
$2.03B
1.9 yrs
$1.58B
31 Jan 2024
$3.61B
$1.90B
1.9 yrs
$1.50B
31 Oct 2023
$3.49B
$1.76B
2.0 yrs
$1.40B
Questions
What is Zscaler's backlog?
Zscaler reported $7.37B of remaining performance obligations at 31 Jul 2026, up 27% from a year earlier and up 14% from the previous quarter. That is 2.2 years of trailing revenue already under contract. Book-to-bill last quarter: 2.01.
How fast does Zscaler's backlog turn into revenue?
Over the last twelve months Zscaler recognised revenue equal to about 55% of the backlog it started each quarter with.
About these numbers
Remaining performance obligations (RPO) are revenue a company has contracted but not yet recognised, as reported in its SEC filings (XBRL tag RevenueRemainingPerformanceObligation). Coverage = backlog ÷ trailing twelve-month revenue. Book-to-bill = (change in backlog + revenue) ÷ revenue. Conversion = revenue recognised ÷ the backlog at the start of each quarter, summed over four quarters. Counterparty values come from company filings and releases.