Notional Pooling: How It Works, Benefits and Risks

Notional pooling lets a bank combine participating account balances when calculating interest, without physically moving the money between those accounts. A business group can use it to offset credit and debit positions while keeping the accounts separate.¹

This guide explains how notional pooling works, how it compares with physical pooling and what a UK treasury team should check before joining a pool. We've also explained how Wise Business can support international payments and transaction records alongside a separate pooling arrangement.

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Note: Wise Business offers a free Essential plan for basic spending and transferring. If you need to receive money, set up direct debits, or generate invoices, you'll pay a one-time £50 setup fee to unlock the Advanced features.

Wise services and features are not available in all regions, country and product restrictions apply. Visit wise.com to check availability, and for fee details and terms for your region, visit our pricing page for Wise Business.

This content is provided for general educational and informational purposes only. It is not intended to provide legal, tax, financial, investment or professional advice and should not be relied upon as such.

The Wise account is not a bank account but offers some similar features and your money is safeguarded.

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Key takeaways

How does notional pooling work?

The bank agrees which accounts will participate and how it will calculate and allocate interest. It then combines their credit and debit balances for that calculation, while the money remains in the individual accounts.¹

For example, Company A has a £400,000 credit balance and Company B has a £250,000 overdraft. In a simple GBP notional pool, the bank could calculate interest using the net £150,000 credit position. Company A would still show £400,000 and Company B would still show its £250,000 overdraft.

This example illustrates the calculation, not a guaranteed return. The actual result depends on the agreed interest formula, fees and borrowing limits. Ask the bank to model it using your group's expected balances, including periods when more companies need cash at once.

Notional pooling vs physical pooling

The main difference is whether money moves between the participating accounts.¹

Groups can also combine structures, such as physical pools for individual currencies linked through a notional arrangement. Availability depends on the bank and relevant jurisdictions.¹

What are the benefits and risks?

Notional pooling may reduce interest costs by offsetting credit and debit balances. Because the pooling itself doesn't transfer money, it can also avoid some of the transaction activity involved in physical pooling.¹

However, separate accounts don't necessarily mean separate financial exposure. Banks commonly require cross-guarantees, where participants support each other's obligations, and rights to offset balances if needed. Review what that would mean for each company if another member couldn't repay its borrowing.¹

Compare the expected interest benefit with the bank's fees and the administration involved. A group whose companies all need to borrow at the same time may have fewer balances available to offset than one with different cash cycles.

What should a UK business check before joining a pool?

Start with the proposed participants, currencies and borrowing needs. Ask the bank which accounts it can include, how interest is allocated and what limits apply to each company. Have legal advisers review guarantees, withdrawal rights and the obligations of every participant.

Then agree the accounting and tax treatment. Where transfer-pricing rules apply to transactions between the related businesses, the terms need to reflect the actual functions, assets and risks of the pool leader and members. Persistent debit or credit positions may need consideration as longer-term loans or deposits rather than short-term pooling balances.²

Keep the agreements, balance records, interest calculations and supporting analysis together. HMRC's guidance explains the evidence needed to support the treatment of transactions between related businesses.³

(DISCLAIMER: This publication is provided for general information purposes only and does not constitute tax, legal or other professional advice from Wise or its affiliates. It is not intended as a substitute for obtaining advice from an accountant, tax advisor or other qualified professional.)

Manage international payments alongside your cash pool with Wise Business

Your business may also need to receive overseas revenue and pay suppliers in the currencies it uses day to day. Eligible UK businesses can use Wise Business to receive supported payments, hold supported currencies and send international business payments.

Connecting supported accounting software can bring those Wise transactions into your books for the finance team's cash review. Your team can use these records alongside its treasury reporting, while the bank manages the notional pool's interest calculation and borrowing limits under the agreements between participants.

Wise Business offers a free Essential plan for basic spending and transferring. If you need to receive money, set up direct debits, or generate invoices, you'll pay a one-time £50 setup fee to unlock the Advanced features.

With Wise Business, you can:

• 🌍 Send money to 70+ countries and pay overseas invoices at the mid-market exchange rate with low, transparent fees and no hidden exchange rate markups (product availability varies by region)
• 📥 Receive payments in 24 currencies and counting
• 💵 Get local account details for 8+ currencies, including USD and EUR, to let your customers pay in a currency they know and trust - convenience for them and peace of mind for you
• 💰 Hold money in 40+ currencies
• 🔁 Convert currencies anytime at the mid-market exchange rate with low, transparent fees
• ⚡ Use the batch payments tool to create and send up to 1,000 payments in a single transfer
• 👥 Run payroll and make international payments for up to 1,000 employees all over the world - including paying suppliers using local payment methods like ACH, SEPA, and Faster Payments
• 💳 Get business debit cards with 0.5% cashback for you and your team to keep track of team expenses and spend all over the world, with real-time visibility and categorisation. See full cashback terms and conditions
• 🏢 Manage cash in 55+ currencies across international offices from a single business account and move money between business accounts in seconds (exact speeds can vary depending on individual circumstances and may not be the same for all transactions)
• 🧾 Connect and sync every business transaction to your favourite accounting software, including Xero, Quickbooks, and more
• 🔐 Create your own payment approvals process to manage your team better with customised access for different team members, roles and permissions
• 📑 Create custom professional invoices and schedule invoice payments for future dates
• 📈 Earn variable returns on GBP, USD and EUR with Wise Interest (Growth not guaranteed. Your balance will go down in the event of a government default or interest rates going negative.)
• 🔗 Create payment links and QR codes to get paid easily (Card payment acceptance for new Wise Business customers is currently unavailable. Payment methods subject to eligibility and availability.)
• ⚙️ Automate payouts with the Wise API (comes with 24/7 customer support, a sandbox account to test integrations, API tokens, and clear documents on how to implement and make the most of our API)

Make the wise choice when selecting a business account for your domestic and global needs.

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Register for Wise Business ✍️

Wise Interest disclaimer: Growth not guaranteed. Your balance will go down in the event of a government default or interest rates going negative. Taxes may apply. 3.32% variable rate on GBP is based on 7 day performance as of 05 Aug 2026. For full 5-year past performance and fund information, visit https://wise.com/interest. Investments are offered by Wise Assets UK Ltd. (FRN 839689)

Wise services and features are not available in all regions, country and product restrictions apply. Visit wise.com to check availability, and for fee details and terms for your region, visit our pricing page for Wise Business.

FAQs

Can notional pooling include different currencies?

Multi-currency arrangements exist, but the bank must support the currencies and structure. Ask how it calculates the combined position and handles exchange-rate movements, interest and borrowing limits.¹

Does notional pooling give each company access to all the group's cash?

No. A participant's ability to draw funds depends on the agreed facilities and limits. Combining balances for interest calculations doesn't give every company unrestricted access to every other account.¹

Sources:

1. OECD: Transfer Pricing Guidance on Financial Transactions, section C.2
2. HMRC: INTM503140 — Cash pooling and the arm's-length principle
3. HMRC: INTM483030 — Transfer pricing documentation

Sources last checked on 6th November 2026