Square and SumUp both offer funding connected to a merchant’s payment activity, but the first comparison is whether your business has an eligible offer. The second is how much cash remains after collections, including any minimum payment requirement. A percentage of card sales does not mean there are no repayment deadlines.
Square offers separate UK products called Square Cash Advance and Square Loans. This comparison concerns Cash Advance, which is available to eligible sole traders and partnerships. Loan-specific repayment conditions should not be applied to the cash advance.
Build the repayment scenario using our guide, MCA Repayments in a UK Cash-Flow Forecast: 13-Week Guide.
For a shop, salon or hospitality business, the better offer is the one that funds a useful purpose while leaving enough cash for wages, suppliers and tax in a weak trading period. Neither brand is automatically cheaper or more suitable for every merchant.
Square and SumUp: the practical comparison
| Question | Square Cash Advance | SumUp Cash Advance |
|---|---|---|
| How do you access an offer? | Through an eligible Square account | Through an eligible SumUp account |
| What should you compare first? | Amount received, fee and repayment conditions | Amount received, fee and repayment conditions |
| Does lower card turnover remove every obligation? | No scheduled minimum or fixed term; contractual duties still apply | No; review monthly minimum and agreed end date |
| What is the operational concern? | Keeping sufficient cash after payment deductions | Keeping sufficient cash after payment deductions |
| Is changing payment provider enough to obtain funding? | Do not assume a new account produces an offer | Do not assume a new account produces an offer |
The product information below comes from the providers’ UK pages. Personalised offers and signed agreements determine the terms that apply to your business.
Square eligibility and repayment features
Square Cash Advance is invitation-only for eligible UK sole traders and partnerships. A dashboard offer permits an application, subject to assessment. Square’s cash advance eligibility guidance explains the application requirements; an offer does not guarantee approval.
Square’s UK Cash Advance guidance specifies no minimum payments or fixed repayment term. Collections use a percentage of gross card sales, including VAT and tips; ordinary processing fees remain separate. Its estimated twelve-month collection period is not a contractual deadline. Square Loans has separate repayment rules.
For your comparison, mark both the routine sales deductions and the dates when extra cash could be required. A forecast showing only daily deductions can conceal a later shortfall.
SumUp eligibility and repayment features
The SumUp UK Cash Advance page says offers are available to selected merchants and are based on sales through SumUp. It describes a fixed fee and automatic collection from card sales. Its detailed repayment section also requires a monthly minimum shown in the offer and full repayment within an agreed period. Although the page advertises funding within two working days, do not commit to a supplier deadline until your own funding is confirmed.
That monthly minimum matters when interpreting “repay as you get paid”. A quiet trading day may produce little collection, while the agreement can still require a monthly amount. Ask what happens if sales deductions fall below it and how any extra payment is requested or collected.
Compare the cash received, not just the headline amount
Make a one-page record for each personalised offer. Include the amount transferred into your bank account, every compulsory financing charge, the total amount to repay and any existing balance cleared from the proceeds.
If a new offer includes refinancing, separate the new agreement’s gross amount from the extra cash available for stock or equipment. An offer for £15,000 that clears an old balance does not provide £15,000 of new spending capacity.
The same principle applies to fees. Establish whether a charge is deducted before payout, added to the repayment balance or paid separately. Use actual net proceeds when deciding whether the offer covers the purchase. Do not assume every provider presents its fee in the same way.
A fixed fee is not an annual interest rate. Paying a given charge over a short period has a different financial effect from paying it over a longer period. If comparing against an interest-bearing loan, use the actual payment schedule and total cash cost; avoid relabelling a flat percentage as APR.
A worked example: cheaper funding can still squeeze cash
Consider two hypothetical offers for a retailer that needs £10,000. These figures are invented for comparison and are not Square or SumUp quotations.
| Item | Offer A | Offer B |
|---|---|---|
| Net cash received | £10,000 | £10,000 |
| Total repayment | £11,200 | £11,500 |
| Illustrative sales collection rate | 12% | 8% |
| Collections on £20,000 eligible sales | £2,400 | £1,600 |
| Collections on £12,000 eligible sales | £1,440 | £960 |
Offer A costs £300 less overall, but the assumed sales rate removes £800 more during the stronger month. That difference could matter if wages and supplier invoices fall due before the next delivery of stock starts selling.
Now assume the weak month leaves £1,700 available after operating costs, tax provision and payment-processing fees, but before finance collections. Offer A leaves £260 after its illustrated collection; Offer B leaves £740. Those figures must then be adjusted for any minimum-payment top-up or other contractual charge. They are not a full affordability assessment.
This illustrates two separate decisions: whether the total price is acceptable, and whether the timing of payments is workable. A lower total price does not automatically produce the safest bank balance. Equally, a smaller collection percentage is not sufficient if a large unpaid balance becomes due later.
Build a forecast around your own sales pattern
Start with the last six to twelve months of actual bank receipts and payment reports where available. Identify the quietest trading period, not just the annual average. A coastal café and a neighbourhood barber can have similar annual turnover but very different cash availability in February.
Keep three figures separate: customer sales, the sales measure used for finance collections, and the money arriving in your bank after deductions. Ask how refunds, chargebacks, tips, VAT and different payment channels affect the calculation. Do not assume the percentage applies to the figure your accountant calls revenue.
Then forecast weekly receipts and outgoings. Include rent, payroll, stock, tax, existing debt and the finance deductions. Add a second version with lower sales and slower stock turnover. If the proposal only works when every week meets the best forecast, reduce the purchase, increase the cash reserve or reconsider borrowing.
For a seasonal business, forecast through the expected collection period and any contractual final repayment date. A twelve-week view helps with immediate liquidity but cannot show obligations falling due later.
Is switching card processors worthwhile for funding?
Do not change payment systems solely because another provider advertises finance. The practical question is whether the new payment setup would suit your business even if no funding offer appeared.
Compare terminal costs, payment fees, settlement arrangements, reporting, integrations and staff retraining. Check any existing contract and the finance agreement before changing where payments are processed. Obtain written confirmation of obligations rather than assuming you can redirect sales while an advance or loan remains outstanding.
If you use more than one account or location, show the provider the full structure. Do not treat all company turnover as eligible repayment turnover unless the agreement says so. A café counter, online store and events terminal may feed different accounts.
What documents should you review before accepting?
Save the offer, the complete terms and a repayment schedule or explanation. Record the legal entity accepting the funding and confirm whether any director or owner has a separate personal obligation.
Useful questions include:
- What exact amount will reach the bank after fees and any refinancing?
- Which sales are counted when calculating deductions?
- What minimum amount must be paid, and on what dates?
- What happens if a minimum is missed or the business closes temporarily?
- Is there a final date when the remaining balance becomes due?
- What changes if the business switches processor, ownership or bank account?
- Does early repayment change the total charge?
- Which complaints process and protections apply to this particular agreement?
Payment-service authorisation does not determine a funding product’s protection. Square states that its UK Cash Advance is not FCA-regulated. Check each agreement’s regulatory status and liability provisions separately.
Frequently asked questions
Can a new merchant immediately obtain Square or SumUp funding?
Do not budget on that assumption. Both routes depend on an eligible offer. Setting up payment processing and qualifying for finance are different steps, and a provider may decline or offer less than you need.
Check the qualification questions in our guide, Merchant Cash Advance Underwriting UK: Funding Steps Explained.
Which is cheaper?
You need comparable written offers to answer that. Compare equal net funding, total compulsory cost, expected repayment timing and the cash retained in slower months. An advertised fixed-fee structure is not a personalised price.
Can I use an offer for equipment rather than stock?
Check permitted uses in the contract. For equipment that will generate value over several years, compare the payment pattern with an appropriate equipment-finance option as well. A short repayment period can consume cash long before the asset has delivered its full benefit.
What if card sales fall?
SumUp’s offer can include a monthly minimum and an agreed repayment period. Square Cash Advance has no scheduled minimum or fixed term, but the outstanding balance and other contractual obligations remain. Contact the provider early if affordability changes.
Choose using a written offer and a realistic cash forecast
Begin with the payment platform your business actually uses and the offers genuinely available to it. Compare costs alongside the weakest trading period and the amount due at the end of the agreement. Leave enough cash to operate after funding collections.
If you want to discuss the funding need with Mehmi Financial Group, contact the team with the amount required, intended use and current repayment commitments. Confirm which options and jurisdictions the team can support; a comparison does not imply a partnership with either provider or guarantee an offer.