Offshore funds have grown up. What used to be a specialized corner for hedge funds and tax‑neutral structures is now a mainstream platform for global investors. In that world, custodians are the quiet workhorses—safeguarding assets, keeping markets humming behind the scenes, and preventing small frictions from turning into big losses. If you manage, advise, or oversee an offshore fund, understanding what custodians actually do (and how to get the best out of them) will pay for itself many times over.
Offshore funds 101—and why custody matters
Offshore funds are investment vehicles domiciled in jurisdictions such as the Cayman Islands, Luxembourg, Ireland, Jersey, Guernsey, Bermuda, BVI, and Mauritius. The appeal is usually tax neutrality, regulatory clarity for cross‑border investors, and established infrastructure—administrators, auditors, depositaries, and custodians that know the terrain.
Custody isn’t optional plumbing. It’s the primary mechanism that keeps investor assets safe, segregated, and available. The custodian sits at the center of trade settlement, asset servicing, corporate actions, cash movements, and—in some frameworks—regulatory oversight of the fund’s operations. When something goes wrong in custody, it doesn’t just create operational headaches; it threatens asset safety, valuation integrity, and investor confidence.
From a practical standpoint, most offshore funds appoint a global custodian headquartered in a major financial center (New York, London, Dublin, Luxembourg, Singapore), which in turn uses a network of local sub‑custodians to access each market. The fund’s domicile is often offshore, but custody is generally onshore with a global institution.
Custodian, depositary, prime broker, administrator—who does what?
Mixing up roles is a common source of risk and cost. Here’s the clean breakdown I use with boards:
- Custodian: Holds assets (securities and cash) in segregated accounts, settles trades, processes corporate actions, collects income, handles proxies, manages FX and cash sweeps, and often supports tax reclaims. For many assets they are the legal holder (as nominee) on behalf of the fund.
- Depositary: A regulatory role under EU regimes (UCITS/AIFMD) and in some other jurisdictions. In addition to safe‑keeping, the depositary performs oversight: cash flow monitoring, ownership verification for non‑custodiable assets, and checks around subscriptions/redemptions and valuation processes. Liability standards can be strict.
- Prime broker: For hedge funds and some liquid alternatives, the PB extends leverage, rehypothecates assets (based on agreements), provides financing and securities lending, and offers execution and risk services. They may hold assets, but that’s not the same as independent custody.
- Administrator: Calculates NAV, maintains the shareholder register, and handles fund accounting and investor services. Admin and custodian often share data and reconciliations but should remain independent.
A painfully learned industry lesson: don’t let the prime broker be your sole “custodian” for long assets you cannot afford to lose. Use an independent custodian for core safe‑keeping, and structure PB relationships around financing and trading.
Core responsibilities of an offshore fund custodian
Safekeeping and segregation
- Legal ownership: Securities are held in the custodian’s nominee name, with the fund as beneficial owner. Properly documented, those assets sit off the custodian’s balance sheet and are bankruptcy‑remote.
- Segregation: Assets are kept in segregated or omnibus accounts. Omnibus with robust books and records is standard, but consider segregation for high‑risk markets or sensitive mandates.
- Sub‑custodian oversight: The global custodian appoints local sub‑custodians. You rely on the global firm’s due diligence, but you should understand the network and any concentration in higher‑risk markets.
Trade settlement and cash management
- Settlement: Matching, instructing, monitoring fails, and troubleshooting market‑specific quirks. Since the US and Canada moved to T+1 in 2024, pre‑funding and tight cut‑offs are a daily reality.
- Cash flow: Cash accounts in multiple currencies, overdraft lines, sweeps into money market funds, and intraday liquidity management.
- FX: Spot, forwards, and standing instructions. FX is one of the most under‑negotiated cost lines. Measure spreads and timestamps.
Asset servicing
- Corporate actions: Mandatory and voluntary events, choice capture, and entitlement calculations. Deadlines vary by market and are unforgiving.
- Income collection and tax: Dividends, coupons, and withholding tax reclaims. Treaty reclaims can add 10–30 bps annually for diversified equity portfolios and more for certain markets—assuming you file correctly and on time.
- Proxy voting and stewardship: Ballots, vote execution, and sometimes research. For managers with ESG commitments, aligning voting policies and audit trails matters.
Collateral, securities lending, and derivatives support
- Collateral management: Margin calls for OTC derivatives, tri‑party agreements, eligible collateral schedules, and substitution mechanics.
- Securities lending: If your policy allows, the custodian (or affiliate) can lend securities and share revenue. Typical splits are 70/30 or 80/20 in favor of the beneficial owner; ensure transparency on borrower tiers, indemnification, and reinvestment risk.
- Derivatives lifecycle: Confirmations, collateral valuation data, and settlement of lifecycle events (coupons, resets, exercises).
Data, reporting, and controls
- Daily positions, cash, and transactions feeds to the administrator and the manager’s OMS/PMS.
- Reconciliations and breaks management with escalation.
- SOC 1 Type II control reports, cyber certifications, and penetration testing disclosures.
In practice, the custodian, admin, and manager form a three‑way control loop—each independently reconciling the same portfolio from slightly different angles. That triangulation is intentional.
Regulatory frameworks: how they shape the custodian’s role
Regulators care deeply about custody because it’s the core investor protection mechanism. The nuances differ by domicile.
EU/UK UCITS and AIFMD
- Depositary requirement: UCITS and EU AIFs must appoint a single depositary. Many global custodians also operate as depositaries, or they partner with local banks.
- Liability: Under AIFMD/UCITS, depositaries have strict liability to return financial instruments lost in custody, barring external events beyond reasonable control. This is not a soft promise; it’s a legal obligation.
- Oversight duties: Cash flow monitoring, ownership verification of non‑custodiable assets (e.g., private equity interests), and oversight of subscriptions/redemptions, valuation frequency, and timely settlement.
- “Depositary‑Lite”: For non‑EU AIFs marketed into the EU via national private placement regimes, a reduced depositary model is allowed in many countries—focusing on cash monitoring and asset verification rather than full custody.
Cayman Islands
- Mutual Funds Act and Private Funds Act: Funds must appoint a custodian to hold custodial assets or put in place alternative arrangements if not practicable, along with independent verification of title and regular cash monitoring. Private funds must also ensure asset valuation and cash processes meet defined standards, typically via independent administrators and auditors.
- Oversight evolution: Since 2020, Cayman has tightened supervision (notably for private funds), emphasizing independent asset verification and valuation. A regulated, reputable custodian goes a long way in satisfying CIMA’s expectations.
Jersey, Guernsey, Bermuda, BVI
- Typically require licensed custodians or designated trustees for public/retail schemes. Professional investor funds often have more flexibility but still need appropriate custody and oversight, documented in offering materials and service agreements.
- Regulators expect asset safety to mirror international best practice even if the letter of the rule is lighter.
Singapore and Hong Kong
- Singapore: Authorized/recognized schemes require a trustee/custodian; private funds in the VCC structure typically appoint a custodian and an independent admin. MAS will look for strong segregation and AML controls.
- Hong Kong: SFC‑authorized funds appoint a trustee/custodian; for private funds managed by Type 9 managers, custody arrangements must be appropriate to the assets and investor base.
A practical takeaway: the legal label (custodian vs depositary) matters less than the substance—independent safekeeping, rigorous oversight, and clear liability pathways.
Asset safety mechanics: what “safe” looks like
Legal structure and bankruptcy remoteness
Your custodian holds assets in a nominee capacity with clear trust or custodial declarations. If the custodian fails, creditors shouldn’t touch client assets. Sound jurisdictions codify this segregation. Verify:
- Client asset rules and trust law in the custodian’s home jurisdiction.
- Account titles, with the fund name, vehicle type, and beneficial owner clarity.
- Disclosure of omnibus vs fully segregated accounts and the firm’s books‑and‑records controls.
Sub‑custodian risk and market specifics
Emerging markets bring unique risks: pre‑funding, beneficial owner registration, quotas, capital controls, and in some cases impossible FX convertibility in stress scenarios. Ask for:
- Country‑by‑country risk assessments.
- The list of sub‑custodians and any indemnities.
- Historic claims performance (e.g., corporate action breaks, income misses).
Omnibus vs segregated accounts
- Omnibus: Lower cost, faster operations, widely used. Asset attribution relies on custodian records.
- Segregated (including individual securities accounts at CSDs in some markets): Higher cost, potentially better protection and transparency. Useful for sensitive mandates or where local rules favor individual accounts.
There’s no one‑size‑fits‑all. I often blend both—segregated in high‑risk markets or for high‑profile funds; omnibus elsewhere.
How custodians handle different asset classes
Public equities and bonds
The straightforward case: trade via a broker, custodian settles at the CSD, manages corporate actions, and collects income. Watchpoints:
- T+1 in North America means you need pre‑funding discipline and earlier FX.
- Corporate actions require crisp election workflows; sloppy instructions cause real value leakage.
Hedge funds with multiple prime brokers
A common model is “tri‑party” custody: the custodian holds long assets, PBs finance and rehypothecate agreed assets, and collateral moves daily. The custodian:
- Tracks positions by beneficial owner across PBs.
- Settles margin calls via tri‑party agents or directly.
- Prevents over‑pledging and monitors eligibility schedules.
A red flag I still see: funds leaving too many core longs at PBs out of convenience. Move them to independent custody and adjust your financing mix.
Private equity and private credit
You can’t put a factory or a senior loan into a depository like a stock. The custodian’s role shifts to:
- Verification of title and ownership documents.
- Safekeeping of legal agreements and evidence of rights (note registers, share certificates, SPV registers).
- Cash monitoring of capital calls, distributions, and escrow flows.
Under AIFMD, the depositary verifies ownership and monitoring of cash flows even when assets aren’t “custodiable.”
Real assets and infrastructure
For direct real estate and infrastructure, the depositary/custodian validates the chain of title and holds bank accounts, insurance certificates, and SPV governance artifacts. They’ll also oversee escrow accounts for acquisitions and capex.
Digital assets
A fast‑moving area. If your offshore fund allocates to crypto:
- Use a regulated digital asset custodian offering MPC or hardware‑based cold storage, SOC 2 Type II, and clear segregation policies.
- Avoid leaving significant balances on exchanges.
- Implement dual‑control withdrawal policies, whitelisting, and 24/7 fraud monitoring.
- Clarify how the custodian values assets for NAV reference and how forks/airdrops are handled.
What high‑performing custody looks like
When I’ve seen custody done right, a few traits stand out:
- Proactive exception management: Custodian flags issues early, with root‑cause analysis and permanent fixes.
- Real time-ish data: Intraday cash updates, position data in standard formats, and APIs alongside SWIFT.
- Transparent economics: Line‑by‑line invoices that let you audit bps, FX spreads, and out‑of‑pocket charges.
- Credible resiliency: Multi‑region data centers, tested disaster recovery, cyber drills, and public attestations.
- Strong sub‑custody governance: Country risk committees, annual onsite audits in key markets, and documented exit plans.
Economics: fees, FX, and the silent P&L
Custody is not just a basis‑point headline fee. It’s a bundle of explicit and implicit costs.
- Safekeeping and transaction fees: Typically a few basis points on assets under custody plus per‑transaction fees. Expect minimums for smaller funds.
- FX: Standing instruction FX can add 5–25 bps of hidden cost depending on currencies and execution policy. Negotiate spreads or route trades to your FX desk.
- Securities lending: Seek a transparent revenue split, collateral quality requirements, and indemnities. Understand reinvestment guidelines to avoid mismatch risk.
- Cash: Interest on cash and MMF sweep yields. Ensure you’re not leaving yield on the table with outdated sweep setups.
- Tax reclaims: Some custodians charge contingent fees on successful reclaims; others include it. The value can be material—on a €100 million European equity sleeve, reclaiming 15% withholding down to 0–10% can add six figures annually.
Tip: Run a 12‑month look‑back on FX timestamps and spreads across currencies. Twice now I’ve found 8–12 bps annualized in recoverable value just by moving off blanket standing instructions.
Selecting a custodian: what to look for
Core evaluation criteria
- Credit strength and scale: Look for strong capital ratios, high credit ratings, and significant assets under custody. As context, the largest global custodians report tens of trillions in assets under custody and administration in public filings.
- Market coverage: Depth of sub‑custody in your target markets, including tricky ones (e.g., India, China, Brazil, Saudi Arabia).
- Technology: API availability, ISO 20022 readiness, portal usability, and integration with your admin and OMS/PMS.
- Operational model: Follow‑the‑sun coverage, dedicated client service teams, and clear escalation paths.
- Regulatory licenses: Ability to act as depositary where required; experience with depositary‑lite; digital asset custody licenses if applicable.
- Ancillary services: Tax reclaim expertise, class action filing, proxy research, ESG reporting, and collateral management.
- Culture and responsiveness: Soft, but decisive. You want a team that answers the phone at 4 a.m. during a market event.
Red flags
- Vague answers about sub‑custody partners and indemnities.
- Limited SOC 1 Type II scope or stale reports.
- One‑size pricing where FX is a black box.
- Frequent service team turnover and slow break resolution.
RFP questions that separate contenders
- Provide a full fee schedule with examples using our expected volumes and markets.
- Detail FX execution methodology, spreads by currency, and evidence of time‑stamping.
- List sub‑custodians by market, including credit ratings and indemnity structure.
- Share your three most recent SOC 1 Type II exceptions and corrective actions.
- Walk us through a recent market disruption (e.g., sanctions event) and how you handled asset servicing and cash movements.
- Outline standard SLAs for settlement timeliness, corporate action election cut‑offs, and break resolution.
Onboarding: a practical step‑by‑step
I’ve led and rescued enough transitions to know the choreography matters. Treat it like a product launch.
1) Define scope and governance
- Agree which funds/sub‑funds, asset classes, and markets are in scope.
- Set up a steering committee with the manager, administrator, custodian, and legal counsel.
- Map dependencies with the prime brokers and counterparties.
2) Documentation and account opening
- Execute master custody agreement, market addenda, and service schedules.
- Open cash and securities accounts, including segregated accounts where needed.
- Put tri‑party collateral and securities lending agreements in place if relevant.
3) Connectivity and data
- Establish SWIFT, SFTP/APIs, and test data files (positions, cash, transactions).
- Align static data: instrument masters, currency codes, market holidays, settlement cycles.
4) Operating model design
- Define trade cut‑offs, FX workflows, and corporate action election processes.
- Agree reconciliations cadence and escalation paths.
- Set SLAs and KPIs (e.g., settlement rate, break aging, corporate action election timeliness).
5) Parallel run and testing
- Run shadow books for two to four weeks; reconcile differences daily.
- Dry‑run corporate actions and proxy votes.
- Test NAV timetables with the administrator, ensuring data arrives on time.
6) Asset migration
- Stage transfers market by market, prioritizing lower‑risk markets first.
- Coordinate with brokers to avoid settlement conflicts during the cutover.
- Validate legal title and entitlements post‑transfer.
7) Go‑live and hypercare
- Increase service cover in the first month; daily steering calls.
- Track KPIs and break logs; fix process snags promptly.
- Conduct a post‑implementation review after 60–90 days.
A smooth transition lives or dies on static data and communication. Most “big” go‑live issues I’ve seen trace back to a tiny mismatched field or an assumption no one wrote down.
Oversight: keeping your custodian honest
Even with a top‑tier custodian, you need a monitoring framework. Think of it as continuous assurance rather than distrust.
- KPIs and KRIs: Settlement rates, corporate action timeliness, reconciliation breaks by category, FX slippage, tax reclaim timeliness, proxy voting completion rates.
- Governance cadence: Monthly operational meetings, quarterly service reviews, and annual strategic reviews. Invite the admin to the ops meetings; triangulation catches issues early.
- Independent testing: Annual SSAE/SOC report review, targeted internal audits, and, for depositaries, testing of oversight procedures.
- Incident playbooks: Define who does what for major market events, cyber incidents, or sanctions changes. Do tabletop exercises.
- Board reporting: Summaries of service quality, exceptions, and remediation. Directors don’t need the plumbing schematics, but they need to know if the pipes are sound.
Common mistakes—and how to avoid them
- Letting PB convenience trump asset safety: Move strategic longs to independent custody. Rehypothecation should be purposeful, not default.
- Ignoring FX: If you can’t show your FX time stamps and spreads, you’re probably paying too much.
- Overlooking tax: Failing to file reclaims, missing relief at source opportunities, or lacking documentation (e.g., residence certificates). Appoint a tax lead and track deadlines.
- Underestimating emerging market friction: Cut‑offs, pre‑funding, and local rules can derail settlement. Use segregated accounts where prudent and test processes before going live.
- Weak corporate actions control: Inconsistent election workflows lead to selection defaults and missed value. Centralize instructions and verify entitlements.
- Sloppy service documentation: If it’s not in the SLA, it’s a wish. Define metrics and remedies.
- No disaster recovery muscle: Ask for DR test results and participate in joint drills. Don’t wait for a real‑world stressor to find the gaps.
- Misaligned fund docs: Ensure offering documents and LPA language match actual custody and oversight arrangements, especially for private funds under Cayman’s Private Funds Act or AIFMD.
Case examples from the trenches
- Hedge fund on T+1: A North America‑heavy equity fund kept standing instruction FX at the custodian post‑T+1. Morning trades in CAD/USD were being funded at end‑of‑day FX, with 12–15 bps slippage. We moved to pre‑trade FX through the manager’s dealing desk and shaved ~9 bps annually off costs.
- Private credit fund’s title verification gap: The fund relied on the admin to confirm loan registers; the depositary flagged inconsistencies during onboarding. We implemented a quarterly third‑party register verification with the custodian and agent banks, eliminating recurring NAV adjustments from late notices.
- Sanctions shock: A multi‑market EM fund saw Russian holdings frozen in 2022. Custodian performance diverged by network—one sub‑custodian was painfully slow in posting corporate actions and clarifying the legal landscape. Lesson learned: insist on scenario playbooks for high‑risk markets and ask for the custodian’s sanctions governance documentation upfront.
Emerging trends shaping custody
- Shorter settlement cycles: T+1 in the US/Canada is here; other markets are watching. Custodians are tightening cut‑offs, and FX workflows must adapt. The next frontier is T+0 for certain asset classes and digital venues.
- Tokenization: Real‑world assets are being tokenized, but custody still needs strong key management, clear title transfer rules, and regulatory recognition. Expect hybrid models for years.
- Data interoperability: ISO 20022 and API‑first operating models are replacing batch files. Managers will increasingly expect event‑driven data flows.
- ESG stewardship at scale: Custodians are building voting analytics and post‑meeting reporting. Boards are asking whether stewardship commitments are reflected in the proxy trail.
- Geopolitical fragmentation: Sanctions, capital controls, and market closures aren’t rare events anymore. Custody networks with flexible routing and strong legal teams will outperform.
Practical checklists
For managers
- Do we have an independent custodian for strategic assets, separate from PBs?
- Are our FX policies documented, measured, and cost‑effective?
- Have we mapped custody for each asset class, including verification for non‑custodiable assets?
- Are tax reclaim processes actively managed with timelines and responsibilities?
- Do our SLAs cover settlement, corporate actions, reconciliations, and data delivery, with penalties or credits?
- Have we tested business continuity and cyber incident response with the custodian?
For fund boards
- Is the custodian’s financial strength and sub‑custody network suitable for our mandate?
- Are depositary or equivalent oversight responsibilities clearly documented and reported?
- Does management provide KPI/KRI dashboards and incident logs for custody services?
- Are offering documents aligned with actual custody/oversight arrangements?
- When was the last independent review of custody fees, FX, and lending economics?
A realistic roadmap to better custody
If you’re not ready for a full RFP, you can still extract value quickly:
- Do a fee and FX health check: Ask for 12 months of FX time‑stamped data and an all‑in fee summary by category. Benchmark quietly.
- Tune corporate action controls: Centralize elections and implement a two‑person verification for voluntary events.
- Update tax documentation: Refresh W‑8BEN‑E/W‑9 and country‑specific forms; review treaty eligibility.
- Pilot an API feed: Start with cash or positions. Reduce manual reconciliations and errors.
- Define escalation playbooks: Write down who calls whom for trade fails, big corporate actions, or market events.
Small steps like these often uncover needles in the haystack—recoverable costs, operational risks, and quick wins that improve investor outcomes.
Final thoughts
Custodians rarely make headlines, and that’s by design. Their best work is invisible: assets in the right place, entitlements collected, risks mitigated, data flowing. Offshore funds layer on cross‑border complexity, varied regulatory regimes, and specialized asset classes. The right custody partner, chosen carefully and managed thoughtfully, becomes a strategic asset rather than a commodity service.
Leverage their scale, but hold them to your standards. Negotiate economics with data. Design for resilience. And keep the triangle tight—custodian, administrator, and manager—so that when markets get rough, your operating model gets calmer, not noisier. That’s how custody quietly compounds value for your investors year after year.