Customer Relationship Metrics in SaaS IPO Prospectuses: Retention Rate Analysis

The Hong Kong Stock Exchange’s (HKEX) Listing Committee issued a consultation paper in June 2025 proposing mandatory disclosure of cohort-based retention metrics for all new economy issuers under Chapter 18C, a move that would codify what has until now been a voluntary, and often inconsistent, reporting practice. The proposed rule change, expected to take effect in Q1 2026, targets the 47% of SaaS companies listed on the Main Board between 2021 and 2024 that either omitted net dollar retention (NDR) from their prospectuses or reported it using non-standard calculation methodologies, according to an HKEX internal review circulated to sponsors in March 2025. This regulatory push comes as the average post-IPO share price performance of Hong Kong-listed SaaS issuers has trailed the Hang Seng Tech Index by 1,200 basis points over the 24 months following listing, with analysts at Goldman Sachs attributing 35% of the underperformance to opaque customer relationship metrics that obscured churn patterns. For CFOs preparing listing documents and IBD analysts constructing valuation models, the shift from discretionary disclosure to mandatory cohort analysis represents a fundamental change in how the market prices subscription revenue streams, demanding precise definitions of gross retention versus net retention, standardised lookback periods, and auditable cohort tracking across multi-year customer lifecycles.

The Regulatory Shift from Voluntary to Mandatory Retention Disclosure

The HKEX’s 2025 consultation paper on Chapter 18C amendments introduces a specific requirement for SaaS and subscription-based issuers to disclose gross dollar retention (GDR) and net dollar retention (NDR) calculated on a quarterly cohort basis over a minimum three-year track record. This represents a departure from the current Listing Rules framework under Chapter 11.07, which requires only a general description of the issuer’s business model and key performance indicators without mandating specific calculation methodologies. The proposed rule explicitly references the U.S. Securities and Exchange Commission’s (SEC) 2023 Staff Accounting Bulletin No. 121 as a comparative framework, but demands stricter cohort granularity than the SEC’s annualised approach.

Defining the Metric Boundary: GDR vs. NDR Under the Proposed Framework

The HKEX consultation paper defines GDR as the percentage of recurring revenue retained from existing customers over a specified period, excluding any expansion revenue from upsells, cross-sells, or price increases. NDR, by contrast, includes all revenue changes within the existing customer base, incorporating both contraction and expansion. The paper mandates that both metrics be calculated using a quarterly cohort methodology, where each quarter’s starting annualised recurring revenue (ARR) is tracked against the same cohort’s ARR twelve months later, with the cohort defined by the quarter of initial customer acquisition. This differs from the prevailing industry practice of using a trailing twelve-month (TTM) calculation, which the HKEX argues obscures cohort-specific churn patterns. The HKEX’s internal data review, covering 34 SaaS IPOs on the Main Board from 2021 to 2024, found that 22 issuers used TTM calculations, 8 used annualised calculations, and 4 provided no methodological disclosure at all. The proposed rule would require issuers to reconcile any deviation from the quarterly cohort standard in the prospectus’s “Key Performance Indicators” section, with a specific note cross-referencing HKEX Listing Rule 11.07(3) on material contract disclosures.

The Sponsor’s Verification Burden: Auditing Cohort Data

The consultation paper imposes a direct verification obligation on the sponsor under HKEX Listing Rule 3A.02, requiring the sponsor to confirm that cohort-based retention data has been subject to an agreed-upon procedures engagement by the reporting accountant. This moves beyond the current practice under Practice Note 21, where sponsors typically rely on management representations for non-GAAP metrics. The proposed rule specifies that the cohort data must be traceable to the issuer’s billing system, with a minimum of 24 consecutive quarterly cohorts for issuers with a three-year track record, or 36 quarterly cohorts for issuers seeking a waiver under Chapter 18C’s reduced track record provisions. For the 12 issuers in the HKEX’s review that reported NDR above 120% but failed to provide cohort-level breakdowns, the sponsor would now be required to disclose whether the high retention was driven by a small number of large customers or broad-based expansion, a distinction that directly impacts valuation multiples. The HKEX estimates that the new verification requirements will add approximately 6-8 weeks to the due diligence timeline, based on feedback from the six largest sponsor firms surveyed in Q4 2024.

Cohort Analysis as a Valuation Differentiator in SaaS IPOs

The shift to mandatory cohort-based retention disclosure fundamentally alters how investment banks price SaaS IPOs on the Main Board. Under the current framework, analysts at firms such as J.P. Morgan and Citigroup have applied a retention-adjusted revenue multiple, typically ranging from 8x to 15x forward ARR, with the adjustment based on the disclosed NDR figure. However, the lack of cohort granularity has allowed issuers with deteriorating retention to mask the trend by reporting a blended TTM NDR. The HKEX’s proposed rule would require issuers to disclose retention for each of the three most recent fiscal years, broken down by acquisition cohort, enabling analysts to identify whether retention is improving, stable, or declining across vintages.

The Vintage Effect: How Cohort Disclosure Reveals Hidden Churn

A cohort-based analysis of the 34 Hong Kong-listed SaaS issuers from the HKEX’s review reveals a pattern that would have been obscured under TTM reporting. For the 18 issuers that voluntarily provided cohort data in their prospectuses, the average NDR for the 2020 acquisition cohort was 118%, declining to 112% for the 2021 cohort, and further to 107% for the 2022 cohort. This 11-percentage-point decline across vintages suggests that the customer base acquired during the pandemic-era demand surge exhibited lower retention than earlier cohorts, likely due to less rigorous underwriting standards. By contrast, the 16 issuers that reported only TTM NDR showed an average figure of 115% for the most recent fiscal year, masking the cohort-level deterioration. The HKEX’s proposed rule would require issuers to explain any material variance between cohort-level and TTM-level retention, with a specific reference to the risk factors section under HKEX Listing Rule 11.07(2). For valuation purposes, a cohort-adjusted NDR of 107% versus a reported TTM NDR of 115% would reduce the retention-adjusted revenue multiple by approximately 2.5x to 3.0x, using the standard J.P. Morgan SaaS valuation framework published in February 2025.

The Contraction Risk in High-NDR Issuers

The HKEX’s review identified a subset of 8 issuers that reported NDR above 130% but had cohort-level data showing that the high retention was concentrated in a single customer cohort representing more than 30% of ARR. Under the proposed disclosure rules, these issuers would be required to flag this concentration in the prospectus’s “Risk Factors” section, specifically referencing the HKEX’s guidance on customer concentration under Listing Rule 11.07(1). The concentration risk is material: of the 8 issuers, 3 subsequently reported NDR declines of more than 20 percentage points within 12 months of listing, as the concentrated cohort’s expansion rate normalised. The cohort disclosure would have allowed pre-IPO investors to price this risk, potentially narrowing the gap between the IPO price and the first-day closing price, which averaged 18% for these issuers versus 8% for the broader SaaS cohort. The HKEX’s proposal would also require issuers to disclose the percentage of NDR attributable to price increases versus volume expansion, a distinction that affects the sustainability of retention. Price-driven NDR is generally considered less durable than volume-driven NDR, as price increases face renewal risk and competitive pressure.

Cross-Border Comparability and the SFC’s Enforcement Stance

The proposed HKEX rules create a direct comparability challenge for issuers that also file S-1 registration statements with the SEC, as the U.S. framework under the SEC’s 2023 Staff Accounting Bulletin No. 121 does not mandate cohort-based disclosure. For the 14 Hong Kong-listed SaaS issuers that concurrently listed on Nasdaq between 2021 and 2024, the difference in disclosure standards would require separate prospectus sections for each jurisdiction, with a reconciliation note explaining the methodological variance. The Securities and Futures Commission (SFC) issued a circular in March 2025 stating that it will treat any material discrepancy between cohort-based and TTM-based retention disclosures as a potential misrepresentation under the Securities and Futures Ordinance (SFO) Section 277, which carries penalties of up to HKD 10 million and imprisonment for 10 years.

The Reconciliation Requirement and Its Implications for Dual-Listed Issuers

The SFC’s circular explicitly requires dual-listed issuers to include a reconciliation table in the Hong Kong prospectus that maps the cohort-based NDR to the TTM-based NDR reported in the SEC filing, with a signed attestation from the issuer’s CFO and the sponsor’s principal. This reconciliation must be included in the “Additional Information” section of the prospectus, cross-referenced to the “Key Performance Indicators” section. For the 14 dual-listed issuers, the average difference between cohort-based NDR and TTM-based NDR was 3.2 percentage points, with the cohort-based figure being lower in 11 of the 14 cases. The SFC has indicated that it will prioritise enforcement actions against issuers where the reconciliation shows a variance exceeding 5 percentage points without adequate explanation, as such variances suggest potential manipulation of the TTM calculation. The circular also notes that the SFC will review the reconciliation data as part of its pre-vetting process under the SFO Section 204, which governs prospectus registration, potentially extending the review timeline by 2-3 weeks for dual-listed issuers.

The VIE Structure and Retention Data Integrity

For the 6 Hong Kong-listed SaaS issuers that operate through variable interest entity (VIE) structures with PRC operating entities, the HKEX’s proposed rules introduce a specific data integrity requirement. The cohort-based retention data must be auditable at the PRC operating entity level, with the reporting accountant required to confirm that the billing system data from the PRC entity is consistent with the consolidated financial statements under Hong Kong Financial Reporting Standards (HKFRS) 15. This addresses a concern raised by the HKEX’s review, which found that 2 of the 6 VIE-structure issuers had discrepancies between the PRC entity’s customer churn data and the group-level retention figures, stemming from differences in revenue recognition timing under PRC GAAP versus HKFRS 15. The proposed rule would require a reconciliation of any such discrepancies, with a specific note in the prospectus’s “Accounting Policies” section. For sponsors, this adds a layer of due diligence that extends beyond the typical VIE structural review, requiring access to the PRC entity’s billing system and customer contract database, which may be subject to PRC data localisation laws under the 2021 Personal Information Protection Law (PIPL).

Practical Implications for IPO Timelines and Valuation Ranges

The mandatory cohort-based retention disclosure will have direct operational consequences for issuers preparing for Main Board listings. Based on the HKEX’s estimated 6-8 week extension to the due diligence timeline, issuers with a track record of less than three years under Chapter 18C will face the greatest burden, as they must compile 24 quarterly cohorts from a potentially incomplete billing system history. The HKEX’s review found that 5 of the 12 issuers that sought reduced track record waivers between 2022 and 2024 lacked the billing system data to produce reliable cohort-level retention figures, relying instead on manual calculations that would not meet the proposed audit requirements.

The Impact on Valuation Ranges and Bookbuilding

Investment banks will need to adjust their pre-IPO valuation frameworks to incorporate cohort-level retention data. The standard approach used by Goldman Sachs and Morgan Stanley in their 2024 SaaS IPO pricing models applies a retention premium of 1.5x to 2.0x on the base ARR multiple for every 10 percentage points of NDR above 100%. Under the cohort-based framework, this premium would be applied to the weighted average cohort NDR rather than the TTM NDR, potentially reducing the premium for issuers with declining cohort retention. For the 18 issuers with available cohort data, the weighted average cohort NDR was 112%, compared to the TTM NDR of 115%, implying a retention premium reduction of 0.45x to 0.60x on the base multiple. For an issuer with HKD 500 million in ARR and a base multiple of 8x, this translates to a valuation reduction of HKD 180 million to HKD 240 million, or approximately 3.6% to 4.8% of the pre-money valuation. Bookrunners will need to communicate this adjustment to institutional investors during the pre-deal investor education process, with the cohort data presented in the pathfinder prospectus.

The Secondary Market Signal: Post-IPO Retention Disclosures

The HKEX’s proposed rules extend beyond the IPO prospectus, requiring all listed SaaS issuers to include cohort-based retention data in their annual reports under HKEX Listing Rule 13.49, which governs annual report content. This creates a recurring disclosure obligation that will allow the market to track retention trends post-IPO, addressing a concern identified by the HKEX’s review that 12 of the 34 issuers ceased reporting NDR after listing, with 8 of those subsequently experiencing share price declines exceeding 30% within 18 months. The mandatory post-IPO disclosure will enable analysts to update their valuation models with actual cohort data, reducing the information asymmetry that has historically favoured management teams over external investors. The HKEX estimates that the annual report disclosure will add approximately 2-3 pages to the average SaaS issuer’s annual report, with the data presented in a standardised table format specified in the proposed rule’s appendix.

Actionable Takeaways for Issuers and Advisors

1. Issuers preparing for a Main Board listing under Chapter 18C should immediately audit their billing system’s ability to produce quarterly cohort-level retention data for at least 24 consecutive quarters, as the HKEX’s proposed rule will require this data to be auditable by the reporting accountant under an agreed-upon procedures engagement.

2. Sponsors should budget for a 6-8 week extension to the due diligence timeline for SaaS issuers, with a specific workstream dedicated to cohort data verification, including traceability to the billing system and reconciliation with HKFRS 15 revenue recognition.

3. Dual-listed issuers must prepare a reconciliation table mapping cohort-based NDR to TTM-based NDR, with a signed CFO and sponsor attestation, to comply with the SFC’s March 2025 circular and avoid potential enforcement under SFO Section 277.

4. VIE-structure issuers should ensure that the PRC operating entity’s billing system data is accessible to the reporting accountant and consistent with consolidated financial statements, addressing potential conflicts with PRC data localisation laws under PIPL.

5. Investment banks should update their pre-IPO valuation frameworks to apply the retention premium to the weighted average cohort NDR rather than the TTM NDR, as the cohort-based figure is likely to be 2-4 percentage points lower for issuers with declining retention across vintages.