Written or reviewed by Libby James, founder of Merchant Advice Service and specialist in merchant payments and complex provider requirements.
Tell us about your business, current payment setup and what you're looking to change. We'll use it to understand your requirements before identifying providers that may be suitable.
A payment provider tells you that it will retain part of your card-processing funds.
You might be offered:
10% rolling reserve held for 180 days
Or your existing provider may introduce a reserve after your account has already been processing.
That can immediately create several questions:
A rolling reserve is not the same as an ordinary settlement delay.
With a settlement delay, the provider normally postpones payment of all eligible funds for an agreed period.
With a rolling reserve, the provider generally retains a percentage of processing while paying the remaining eligible balance according to the normal settlement timetable.
That percentage can build into a substantial sum.
For a merchant processing £1 million per month, a 10% reserve means that up to £100,000 of new processing may be retained each month before earlier reserve amounts begin to be released.
This guide explains how merchant account rolling reserves work, how to calculate their cash-flow impact and what to do if a provider introduces, increases or extends a reserve.
A rolling reserve is an arrangement under which a payment provider retains an agreed percentage of a merchant’s card-processing funds.
Each retained amount is normally held for the period specified in the merchant agreement or reserve notice.
Subject to the provider’s terms and any deductions, that amount may then be released when its individual holding period ends.
A simplified example is:
Monthly card processing: £500,000
Rolling reserve: 10%
New reserve retained: £50,000
Remaining eligible processing: £450,000 before other deductions
If each amount is held for an agreed rolling period, the £50,000 retained from January may be scheduled for release separately from the £50,000 retained in February.
The reserve therefore operates as a sequence of retained amounts rather than necessarily one lump sum returned on a single date.
Providers can use different reserve structures and terminology. The precise percentage, holding period, release process and permitted deductions depend on the merchant agreement and provider’s risk decision.
Suppose a merchant processes:
£500,000 each month
The provider applies:
10% rolling reserve
Each month:
£50,000 is retained
and:
£450,000 remains available for ordinary settlement before fees, refunds, chargebacks and other adjustments.
The simplified reserve cycle could look like this:
| Processing month | Card processing | New reserve retained | Earlier reserve released |
|---|---|---|---|
| January | £500,000 | £50,000 | £0 |
| February | £500,000 | £50,000 | £0 |
| March | £500,000 | £50,000 | £0 |
| Later release month | £500,000 | £50,000 | January reserve, subject to terms |
| Following month | £500,000 | £50,000 | February reserve, subject to terms |
Once the release cycle begins, the merchant may see:
new reserve retained
and:
older reserve released
within the same settlement period.
That does not necessarily mean the reserve balance will remain exactly the same.
It can change where:
The phrase:
10% held for 180 days
does not by itself explain how the provider calculates and releases the money.
Ask whether:
A provider may calculate the reserve at transaction level but show it as a monthly balance.
Another may retain and release funds through settlement batches.
The merchant should understand both the underlying calculation and how it appears in reports.
A rolling reserve is not normally the same as an ordinary processing charge.
A processing fee is generally an amount the merchant pays for the payment service.
A reserve is money retained as financial security against potential liabilities.
However, saying:
“It is not a fee”
does not mean it has no cost to the business.
The merchant cannot use the retained money for:
The reserve therefore creates a liquidity and working-capital cost, even where the retained balance is ultimately released.
The business should separate:
processing expense
from:
restricted or retained cash
when analysing the commercial impact.
Accounting treatment can depend on the contract and circumstances, so the business should obtain advice from its accountant rather than automatically recording the reserve as either an expense or ordinary available cash.
Providers commonly use reserves to ensure that money is available to meet liabilities such as refunds, disputes and negative balances.
That can prevent the merchant account from immediately falling into deficit when a customer claim arises.
But the reserve is primarily a risk condition imposed or controlled under the provider agreement.
The merchant should not assume that it:
For example, Stripe’s current terms state that it can control a reserve, use it against applicable amounts and change the reserve terms where it believes the underlying risk has changed. Stripe says release occurs when it is satisfied that the relevant exposure has been mitigated.
The merchant’s own agreement is therefore crucial.
Several arrangements are commonly described as:
“The provider is holding our money.”
They are not necessarily the same.
A percentage of processing is retained and each retained amount is held for an agreed rolling period.
Example:
10% of each transaction held for the period set out in the agreement.
The provider requires a specific amount to remain available as security.
Example:
£100,000 fixed reserve
The provider may build this amount from settlements, request it upfront or fund it through another agreed method.
Stripe describes both fixed and rolling reserves in its current reserve guidance.
A percentage is retained until the reserve reaches a maximum value.
For example:
10% retained until the reserve reaches £250,000
The provider should explain whether new amounts continue to be retained once the cap is reached and what can cause the cap to change.
All or most eligible processing is paid after an agreed delay.
For example:
T+7 settlement
This differs from retaining only a percentage while paying the balance earlier.
The provider holds a set amount against potential processing losses.
Some providers distinguish a merchant-controlled operational reserve from a provider-determined deposit. Adyen, for example, describes its reserve as an available balance used for refunds and chargebacks, while its separately calculated deposit can be withheld against payment-processing liabilities and adjusted as exposure changes.
A specific payment or group of payments is temporarily withheld.
This may follow:
The provider pauses some or all merchant payouts during an account review.
This is usually a wider restriction than an ordinary rolling reserve.
Refunds, chargebacks and fees exceed the money currently available.
The provider may use future settlements, reserved funds or another contractual recovery route to cover the shortfall.
The provider is considering its potential exposure if customers become entitled to refunds or raise disputes after the merchant has already received settlement.
Factors can include:
Stripe’s current reserve guidance says it assesses matters including industry conditions, payment activity, dispute rates, refund rates and financial stability. It also identifies long fulfilment periods, elevated disputes and sudden unexplained increases in processing as potential reasons for applying a reserve.
These are examples of one provider’s approach rather than a universal underwriting formula.
Future delivery is a common reason a provider may consider additional financial security.
Examples include:
Consider a travel company that processes:
The provider may not only consider this month’s card volume.
It may ask:
How much customer money relates to holidays that have not yet taken place?
If the merchant ceased trading, future customer disputes could exceed one month’s processing.
The provider may therefore assess:
The reserve should be reviewed against the provider’s actual estimate of exposure rather than treated as an automatic percentage applied to every merchant in the sector. A rolling reserve is one possible way an acquirer can manage this exposure, but the reserve itself is not the underlying risk. Our guide to future-delivery risk in payment processing explains how customer payments, outstanding fulfilment and peak exposure can affect merchant underwriting.
A subscription business can also create future obligations.
Examples include:
The merchant may receive the money before delivering the full period of service.
The provider may therefore consider:
Stripe’s credit-risk guidance specifically identifies long billing periods, including annual billing, retainers and account credits, as factors that can increase refund and dispute exposure.
A business taking occasional payments of:
£10,000, £25,000 or £50,000
can create a different exposure from one processing the same monthly value through small transactions.
For example:
Processes £500,000 through 20,000 transactions.
Processes £500,000 through 20 transactions.
The same number of disputes could produce a dramatically different financial value.
A provider may therefore examine:
For more detail, see the MAS guide to high-value card payments.
The initial merchant account offer may include:
The merchant should review these terms before processing begins.
Do not focus only on:
Card rate: 0.8%
while overlooking:
10% of turnover retained
A lower processing rate may have limited value if the reserve removes the working capital needed to operate the business.
A merchant may process successfully for months or years and then receive a notice changing its funding terms.
Possible triggers can include:
For example, Stripe’s current terms permit it to change reserve terms where it believes there has been or is likely to be a change in the underlying risk, or where a financial provider requires it.
Another provider’s rights will depend on its own agreement.
Do not begin by submitting several rushed applications elsewhere.
First establish exactly what is changing.
Record:
Check the clauses covering:
Ask:
Ask:
Calculate:
The provider may not disclose every detail of its risk model.
However, ask whether the main concern relates to:
Respond to the actual concern.
Obtain the review process and evidence requirements in writing where possible.
The provider already knows that withholding money affects cash flow.
A stronger response explains:
For example:
Refunds increased in March after one supplier failed. That supplier was replaced on 18 March, affected customers were refunded and fulfilment returned to two working days. Attached are the following three months of transaction, refund and delivery data. We would like the reserve reviewed after a further three months of stable processing.
That gives the provider evidence to assess.
Suppose the business processes:
£1 million each month
The provider applies:
10% rolling reserve
The new retained amount is:
£100,000 each month
Before the first release cycle begins, the simplified position could be:
| Month | New reserve retained | Cumulative amount retained before deductions |
|---|---|---|
| Month 1 | £100,000 | £100,000 |
| Month 2 | £100,000 | £200,000 |
| Month 3 | £100,000 | £300,000 |
| Month 4 | £100,000 | £400,000 |
| Month 5 | £100,000 | £500,000 |
| Month 6 | £100,000 | £600,000 |
This simplified example assumes:
Once scheduled releases begin, the cumulative balance may stabilise, rise or fall depending on current processing and deductions.
Do not ask only:
How much is held each month?
Ask:
What is the maximum reserve balance we are likely to fund before releases begin?
The answer may depend on:
A business may be able to manage £50,000 being retained once.
It may not be able to finance £50,000 of new retention every month for six months.
A provider might describe:
10% reserve
as though only 10% of one month is affected.
But where each retained amount remains held for a longer rolling period, the total balance can represent several months of reserve deductions.
For example:
Monthly processing: £750,000
Reserve: 10%
New monthly retention: £75,000
After six similar months without releases:
Simplified cumulative reserve: £450,000
The merchant should therefore model the total funding requirement rather than treating the reserve as one 10% deduction.
Suppose processing grows from:
£250,000 per month
to:
£1 million per month
At 10%:
The percentage has not changed.
But the cash-flow impact has quadrupled.
This can also prompt the provider to reassess whether:
Rapid growth should be explained to the provider before it appears unexpectedly in payment data.
A seasonal merchant may have a reserve that grows rapidly during its busiest period.
Examples include:
The business should model:
A reserve based on summer processing may create cash-flow pressure long after sales have fallen.
The answer depends on the provider agreement.
Potential uses can include:
Stripe says that when a reserved transaction is refunded or disputed, the corresponding reserve can be released and used to cover that refund or dispute. It says unused reserve funds are released at the end of the reserve period, subject to the account position.
Adyen similarly describes reserve balances as funds available to cover refunds, chargebacks and other operational expenses where pending and next-payout balances are insufficient.
These examples illustrate provider practice but do not replace the merchant’s own agreement.
Suppose the amount originally retained was:
£50,000
Before its scheduled release, the provider uses:
£7,000 to cover a dispute and related amount under the agreement.
The amount ultimately released may therefore be:
£43,000
rather than the original £50,000.
The settlement report should explain:
Without transaction-level reporting, the merchant may simply see a lower-than-expected payout.
A merchant may keep a spreadsheet saying:
£50,000 due back on 1 August
But the provider’s balance may show:
Reserve reconciliation should include both:
retention
and:
later use or adjustment.
A useful report should allow the merchant to identify:
The merchant should be able to reconcile:
Gross transactions
↓
Refunds and adjustments
↓
Fees
↓
New reserve retained
↓
Older reserve released
↓
Net payout
For more detail, see the MAS guide to card payment settlement times.
Suppose the merchant has:
Gross sales: £100,000
Refunds: £4,000
Processing fees: £1,500
New rolling reserve: £10,000
Older reserve released: £7,000
Chargeback deduction: £2,000
The simplified payout is:
| Item | Amount |
|---|---|
| Gross sales | £100,000 |
| Less refunds | £4,000 |
| Less processing fees | £1,500 |
| Less new reserve | £10,000 |
| Add older reserve release | £7,000 |
| Less chargeback | £2,000 |
| Illustrative net payout | £89,500 |
The payout differs from both:
because earlier reserve releases and other deductions are also included.
Potentially, where the merchant agreement permits it.
The provider may change:
Possible reasons may include:
The merchant should ask for:
Do not assume that the original reserve percentage is fixed for the lifetime of the account.
Potentially.
A provider may review the position before the expected end of the reserve period.
Depending on its assessment, it may:
Stripe’s current reserve guidance states that it reviews factors such as financial health, refunds and disputes when deciding whether a reserve should be removed, reduced, increased or extended.
The merchant should therefore avoid treating the original end date as an unconditional promise unless the agreement clearly supports that interpretation.
Potentially, but never automatically.
Negotiation may take place:
Possible changes could include:
Provider terms and alternatives vary.
Stripe’s terms, for example, allow it to require other forms of credit support, including certain guarantees or letters of credit.
That does not mean every merchant will be offered an alternative.
Depending on the concern, useful information can include:
Evidence might include:
Evidence might include:
Evidence might include:
Rather than asking only:
Can you remove the reserve?
ask:
Which measurable conditions would support a review?
For example:
The provider may not commit to a particular outcome.
But obtaining the criteria can help the business decide whether a future review is realistic.
No.
Disputes are only one part of the risk assessment.
A merchant may have few historical chargebacks but still create future exposure through:
Likewise, an isolated period of higher disputes does not automatically mean that no reduction is possible.
The provider may consider:
Do not rely on a single universal chargeback percentage as proof that a reserve is or is not justified.
Potentially, but the decision needs care.
Another provider may offer:
It may also offer:
A quotation stating:
No reserve expected
should not be treated as final unless the full application has been underwritten and the written offer confirms the terms.
Before switching, confirm:
A salesperson saying:
We should be able to offer no reserve
is not the same as final underwriting.
The replacement account should be fully disclosed and properly configured.
For more detail, see the MAS high-risk merchant account application guide.
Consider two offers.
Provider A has the lower transaction rate and faster headline settlement.
But it retains:
£100,000 for every £1 million processed
before reserve releases begin.
Provider B charges an additional:
0.2% = £2,000 per £1 million
but may leave considerably more cash immediately available.
The meaningful comparison is:
How much usable money reaches the business bank account, when, and at what total cost?
Suppose switching reduces processing cost by:
£3,000 per month
but introduces:
£75,000 of new reserve withholding each month.
The annual fee saving could still be valuable.
But it does not solve the immediate funding requirement.
The business must compare:
A small card-rate saving should not be reviewed independently from cash flow.
Some merchants finance the working-capital gap using:
That does not make the reserve cheaper.
The business should calculate:
A finance product should not be taken simply because a payment provider introduced a reserve without first understanding the full commercial effect and risks.
If the reserve is based on a percentage of each new transaction, lower processing can reduce new retention.
However:
A merchant should not assume that a lower current volume immediately releases the existing balance.
Ask whether the reserve is:
Stopping new processing does not necessarily release the reserve immediately.
Customer liabilities can continue after the final sale.
For example:
The provider may retain reserve funds for the period permitted by the agreement or until it considers the remaining exposure resolved.
Checkout.com’s current closure guidance, for example, says that where reserves exist, they remain held for the duration specified in the merchant agreement.
That is one provider’s policy; the merchant must check its own contract.
Before the account closes, obtain:
Download:
Keep the receiving bank account open until the final reserve release is complete where possible.
The new provider may begin processing new transactions.
The previous provider can still retain the historic reserve under the old agreement.
The business may temporarily have:
This overlap can create a substantial cash-flow requirement.
Model it before moving.
Potentially, where the agreement permits, to cover liabilities arising from historic processing.
These may include:
The merchant should ask for a final reconciliation showing:
Do not accept only a final bank payment without obtaining the report explaining how it was calculated.
Start with the written terms and provider records.
Check:
Request written confirmation of:
Check whether:
have reduced the amount.
Submit a clear chronology containing:
Where a substantial sum is disputed or the merchant’s financial position is at risk, legal, accounting or insolvency advice may be appropriate.
Merchant Advice Service cannot compel a provider to release funds.
A fixed reserve may provide more certainty about the maximum amount withheld.
For example:
Fixed reserve: £200,000
Once funded, ordinary processing may no longer create new reserve deductions unless:
A rolling reserve changes with processing.
For example:
10% of each transaction
The most suitable structure depends on:
A fixed reserve is not automatically better.
Funding £200,000 immediately may be harder than building the same amount gradually.
A capped reserve gives the merchant an expected maximum under the stated terms.
For example:
10% rolling reserve capped at £300,000
Ask:
An uncapped percentage can create a continuously growing balance where processing increases faster than releases.
An international merchant may have reserve balances in:
Ask:
A reserve described as:
£250,000 equivalent
may change in practical value if the underlying funds are held in several currencies.
Platforms can face more than one type of reserve.
There may be:
The platform should establish:
Stripe’s Connect documentation, for example, describes platform reserves used when connected-account balances become negative.
Marketplace reserves need to be reviewed alongside seller payout, onboarding and contractual responsibilities.
For more information, see the MAS guide to marketplace payment gateways.
Before accepting an offer, ask for the reserve terms in writing.
Before signing, confirm:
Do not rely only on a salesperson’s summary.
The merchant agreement and final underwriting offer should reflect the agreed terms.
Tell Merchant Advice Service:
MAS can help you:
Merchant Advice Service cannot:
Final underwriting, reserve, settlement and security terms remain with the relevant payment provider.
Merchant Advice Service provides free, independent guidance to businesses looking for help with card payments, payment gateways and more complex payment requirements.
Where appropriate, MAS may introduce a business to a relevant payment provider. We may receive a referral fee or commission if an introduction results in a completed account or service.
MAS does not necessarily compare every provider in the market, and all applications remain subject to the relevant provider’s own assessment, underwriting and approval.
This article provides general payments information and does not constitute legal, regulatory, financial, accounting or insolvency advice. Reserve percentages, holding periods, releases, deductions and security terms vary between providers and merchant agreements.
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Libby James is the founder and Managing Director of Merchant Advice Service. Since 2016, she has worked directly with businesses and payment providers across merchant accounts, card processing, payment gateways and complex provider requirements.
Libby specialises in high-risk, declined and harder-to-place merchants, as well as businesses requiring specialist payment methods, integrations or international support. She writes and reviews Merchant Advice Service content, drawing on practical experience gained from real merchant enquiries and provider relationships.
