Net Dollar Retention Rate: Existing Customer Growth Potential for IPOs

The SFC and HKEX’s joint consultation conclusions on GEM reform, published in December 2024, introduced a new “market capitalisation/revenue test” that allows high-growth enterprises to list on GEM without a profit track record. This shift—effective 1 January 2025—has forced sponsors and analysts to re-evaluate the metrics that truly signal an issuer’s quality. Among the non-GAAP measures now receiving heightened scrutiny is Net Dollar Retention Rate (NDR), a SaaS-adjacent metric that measures revenue expansion from existing customers. While HKEX Listing Rules do not mandate NDR disclosure, the SFC’s 2023 “Guidance on Disclosure of Alternative Performance Measures” (APMs) explicitly warns against misleading presentations. For CFOs preparing for a HKEX Main Board or GEM listing, understanding how to calculate, audit, and position NDR is no longer optional—it is a competitive necessity in a market where institutional investors demand proof of recurring revenue stickiness. This article dissects NDR’s mechanics, its regulatory treatment under Hong Kong’s disclosure regime, and how IPO candidates can use it to differentiate themselves without running afoul of the SFC’s enforcement priorities.

The Mechanics of Net Dollar Retention Rate

Definition and Calculation

Net Dollar Retention Rate measures the percentage of recurring revenue retained from an existing customer cohort over a defined period—typically 12 months—after accounting for expansions, contractions, and churn. The formula is straightforward: (Starting ARR from cohort + Expansion ARR – Contraction ARR – Churned ARR) / Starting ARR from cohort. A NDR above 100% indicates that existing customers are spending more over time, while a figure below 100% signals net revenue loss. For Hong Kong-listed SaaS companies such as Weimob (2013.HK) and Kingdee International (268.HK), NDR has become a key investor briefing metric, though neither is required to disclose it in statutory filings under the Companies Ordinance (Cap. 622).

The calculation requires precise segmentation. Issuers must define the “cohort” as customers active at the start of the measurement period, exclude new customer revenue entirely, and treat any revenue from acquired entities separately. The HKEX’s “Guidance Letter on Disclosure of Non-GAAP Financial Measures” (GL57-23) advises that such metrics should be reconciled to the most directly comparable GAAP figure—in this case, revenue from contracts with customers under HKFRS 15. Failure to provide this reconciliation exposes the issuer to SFC enforcement action under section 277 of the Securities and Futures Ordinance (Cap. 571), which prohibits false or misleading statements in listing documents.

Why NDR Matters More Than Gross Revenue Growth

Gross revenue growth can mask deteriorating unit economics. A company adding 30% new customers while losing 20% of existing revenue still reports 10% top-line growth, but its NDR reveals the underlying fragility. For IPO investors, NDR is a leading indicator of customer satisfaction, product stickiness, and the efficiency of the upsell/cross-sell engine. Data from the 2024 “Bessemer Venture Partners Cloud Index” shows that public cloud companies with NDR above 120% trade at a median revenue multiple of 9.5x, versus 4.2x for those below 110%—a premium that Hong Kong family offices and institutional investors are increasingly pricing into their valuation models.

The relevance is acute for HKEX-listed tech companies. Tencent (700.HK) does not disclose NDR, but its cloud segment’s annual recurring revenue (ARR) growth of 18% in FY2024, coupled with a reported customer churn rate below 5%, implies an NDR in the 110-115% range. Comparatively, Meituan (3690.HK) does not operate a subscription model, rendering NDR inapplicable. For IPO candidates in the enterprise software or fintech space—such as the pending listing of Ping An Healthcare Technology’s SaaS subsidiary—NDR provides a defensible, auditable proxy for long-term value creation.

Regulatory Treatment Under Hong Kong’s Disclosure Regime

SFC Guidance on Alternative Performance Measures

The SFC’s “Guidance on Disclosure of Alternative Performance Measures” (2023) sets the framework for how non-GAAP figures like NDR must be presented in listing documents, annual reports, and investor presentations. The guidance requires that APMs be clearly defined, consistently calculated, and reconciled to the most directly comparable GAAP measure. For NDR, this means the issuer must disclose the GAAP revenue line it is adjusting, explain the adjustments for churn and expansion, and present the NDR figure alongside the GAAP revenue growth rate for the same period.

The SFC specifically warns against “cherry-picking” favourable periods. If an issuer reports NDR for the 12 months ended June 2024, it must also disclose the figure for the 12 months ended June 2023, and explain any material changes. The 2023 enforcement action against China Youran Dairy Group (9858.HK) serves as a cautionary tale: the company was fined HKD 4.5 million by the Market Misconduct Tribunal for presenting a non-GAAP profit metric without adequate reconciliation, in violation of the Securities and Futures Ordinance (Cap. 571). While NDR was not the metric in question, the precedent applies directly.

HKEX Listing Rules and Prospectus Disclosure

HKEX Listing Rules do not explicitly mandate NDR disclosure. However, Rule 11.07 of the Main Board Listing Rules requires that a listing document contain “all information necessary to enable a reasonable investor to make an informed assessment of the issuer’s financial condition and prospects.” For SaaS or subscription-based issuers, where NDR is a standard industry metric, omitting it could be seen as a material omission—particularly if competitors disclose it. The HKEX’s “Guidance Letter on IPO Vetting” (GL68-13) advises that issuers should consider whether non-GAAP measures are “commonly used by analysts and investors in the issuer’s industry” and, if so, include them with appropriate context.

For GEM listings under the new market capitalisation/revenue test, NDR takes on additional significance. The test requires an issuer to demonstrate a “high growth trajectory,” defined as annual revenue growth of at least 20% for the two most recent financial years. An NDR above 110% can substantiate that growth as organic and sustainable, rather than dependent on customer acquisition spend. The HKEX’s “Guidance on GEM Listing” (GL85-24) explicitly references “customer retention and expansion metrics” as factors the Listing Division may consider in assessing an applicant’s business model viability.

Practical Application for IPO Candidates

Building an Auditable NDR Calculation

Sponsors must ensure that NDR calculations are auditable and consistent with the issuer’s internal management reporting. The calculation should be based on the same customer master data used for HKFRS 15 revenue recognition, with clear documentation of how “expansion” is defined—whether it includes price increases, upsells, cross-sells, or usage-based growth. The audit committee, in line with the HKEX’s “Corporate Governance Code” (CG Code, effective 1 January 2025), should review the methodology and ensure it aligns with the issuer’s stated business metrics.

A common pitfall is including one-time fees or professional services revenue in the NDR numerator. The SFC’s guidance on APMs requires that such items be excluded or separately disclosed. For example, if a SaaS company sells a consulting engagement to an existing customer, that revenue should not inflate the NDR calculation unless it is recurring in nature. The auditor—typically a Big Four firm in Hong Kong—should issue a “report on agreed-upon procedures” for the NDR figure, similar to the comfort letters provided for revenue figures under HKFRS 15.

Positioning NDR in the Prospectus

The prospectus should present NDR in the “Business” section, not the financial statements, to avoid confusion with GAAP metrics. A typical disclosure would read: “Net Dollar Retention Rate of 115% for the 12 months ended 31 December 2024, calculated as the total recurring revenue from customers who were active as of 1 January 2024, divided by the recurring revenue from the same cohort at 1 January 2024.” The prospectus should also include a reconciliation table showing the GAAP revenue from contracts with customers, adjustments for new customer revenue, and the resulting NDR.

The HKEX’s “Guidance Letter on Prospectus Disclosure” (GL56-13) advises that non-GAAP measures should not be given “undue prominence.” This means NDR should not appear in the prospectus summary or the front page, but can be included in the management discussion and analysis (MD&A) section. For Main Board listings, the sponsor must confirm in the sponsor’s declaration (Form A1) that the NDR calculation is consistent with the issuer’s internal reporting and has been reviewed by the audit committee.

Case Study: A Hypothetical HKEX SaaS IPO

Consider a hypothetical Hong Kong-based SaaS company, CloudCo Ltd., preparing for a Main Board listing in 2025. CloudCo reports ARR of HKD 500 million as of 31 December 2024, with a gross revenue growth of 40% year-on-year. However, its NDR is 95%, meaning existing customers are shrinking their spend. A sponsor relying solely on gross revenue growth would present a misleading picture. The SFC, under its 2023 APM guidance, would require CloudCo to disclose both metrics and explain the divergence.

Conversely, a competitor, DataStream Ltd., reports 25% gross revenue growth but an NDR of 125%. DataStream can argue that its growth is more durable, as existing customers are expanding faster than new ones are being added. This metric would be particularly persuasive for the HKEX’s GEM listing vetting, where the Listing Division may request additional evidence of “high growth” under the new test. DataStream’s sponsor should prepare a written analysis, similar to the “profit forecast” memorandum required under Rule 11.16 of the Main Board Listing Rules, to support the NDR figure.

Market Implications and Investor Sentiment

Institutional Investor Demand for NDR

Hong Kong family offices and institutional investors are increasingly sophisticated in their use of non-GAAP metrics. A 2024 survey by the Hong Kong Investment Funds Association (HKIFA) found that 68% of respondents consider NDR a “critical” or “very important” metric when evaluating SaaS or subscription-based IPOs, up from 42% in 2022. This shift reflects the growing presence of US-style venture capital and growth equity investors in Hong Kong’s IPO market, who are accustomed to NDR being a standard disclosure in Nasdaq filings.

For issuers targeting a dual-primary listing on HKEX and Nasdaq—a structure used by companies like JD.com (9618.HK) and NetEase (9999.HK)—consistency in NDR calculation across both jurisdictions is essential. The US Securities and Exchange Commission (SEC) does not prescribe NDR disclosure either, but the SEC’s “Guidance on Non-GAAP Financial Measures” (2022) imposes similar requirements for reconciliation and prominence. A mismatch between the NDR disclosed in Hong Kong and the US could trigger questions from the SFC under its cross-border enforcement framework.

The Risk of NDR Manipulation

NDR is not immune to manipulation. An issuer can inflate NDR by redefining the customer cohort—for example, excluding customers with low initial spend or extending the measurement period to capture non-recurring revenue. The SFC’s 2023 APM guidance explicitly prohibits “adjustments that are not clearly explained or that are inconsistent with the issuer’s historical practice.” In 2024, the SFC issued a reprimand to a GEM-listed software company for presenting a “customer retention rate” that excluded churned customers who had not generated revenue in the prior period, violating the requirement for “consistent application” under the guidance.

Sponsors should implement internal controls to prevent such manipulation. The audit committee should review the methodology annually, and the sponsor should include a specific representation in the sponsor’s declaration that the NDR figure is “calculated in accordance with the methodology disclosed and has been reviewed by the audit committee.” This level of rigour aligns with the HKEX’s “Guidance on Sponsor Responsibilities” (GL58-13), which requires sponsors to take “reasonable steps to ensure that all material information in the listing document is accurate and complete.”

Actionable Takeaways

1. IPO candidates in subscription-based industries should calculate NDR for at least three consecutive 12-month periods and include the metric in the MD&A section of the prospectus, with a full reconciliation to HKFRS 15 revenue.

2. Sponsors must ensure the NDR calculation is auditable and consistent with the issuer’s internal management reporting, and should obtain a report on agreed-upon procedures from the auditor.

3. Issuers should avoid presenting NDR in the prospectus summary or front page, as this would violate the HKEX’s guidance on “undue prominence” of non-GAAP measures.

4. For GEM listings under the new market capitalisation/revenue test, a NDR above 110% can serve as persuasive evidence of organic, sustainable growth for the Listing Division’s assessment.

5. Family offices and institutional investors should cross-reference NDR with GAAP revenue growth and churn rates, and request the issuer’s methodology documentation to verify the calculation is free of manipulation.