What Is the Discount Charge in Invoice Finance?
The discount charge is effectively interest on the money advanced to you. It is quoted as a percentage above Bank of England base rate (typically base + 1-3%) and charged daily on the outstanding advance until your customer pays. The longer your customer takes to pay, the more discount charge you pay.
As of 18 December 2025 the Bank of England base rate is 3.75%, so a discount charge of base plus 1% to 3% currently works out at roughly 4.75% to 6.75% annualised on the cash advanced.
Why This Matters
The discount charge is the principal cost of invoice finance and directly impacts whether a facility is profitable for your business. Unlike a simple percentage fee, it accrues daily on the cash you've drawn down, meaning a customer who pays in 90 days costs you three times more than one who pays in 30 days.
For a typical UK SME advancing 85% of a £50,000 invoice at base rate plus 2.5%, a 30-day payment costs roughly £218 in discount charges, while 90 days costs about £655. This daily accrual structure makes invoice finance expensive for businesses with slow-paying customers but cost-effective when customers pay promptly.
Many businesses focus solely on the service fee and underestimate how much the discount charge adds over a year.
Key Points
- Discount charges are quoted as a margin above Bank of England base rate (currently 3.75% as of 18 December 2025), typically base plus 1% to 3%, giving total rates of 4.75% to 6.75% for most SMEs
- Charges accrue daily on the actual amount advanced, not the invoice value. If you draw 85% of a £100,000 invoice, you pay discount charge on £85,000, not £100,000
- Calculation is daily: a 7.5% annual rate equals approximately 0.0205% per day (7.5% divided by 365), charged on the outstanding balance each day until your customer pays
- Fast-paying customers reduce your cost significantly. An invoice paid in 35 days costs half the discount charge of one paid in 70 days, making invoice finance particularly suitable for sectors with reliable 30-45 day payment cycles
- Discount charges stop accruing when the customer pays the invoice finance provider, not when they pay you, meaning delays in payment allocation or bank processing can add extra days of charges
- Providers calculate discount charge differently on the unadvanced portion (the remaining 10-25% of invoice value held as reserve). Some charge discount on the full invoice, some only on the advance, creating a significant cost difference
- Your margin above base rate depends on turnover, sector risk, debtor quality and whether you provide personal guarantees. Construction and recruitment companies typically pay 0.5-1% more than professional services firms with blue-chip debtors
Illustrative Example
Hypothetical: a Birmingham IT consultancy with £800,000 turnover invoices an NHS trust for £40,000 on 30-day terms. They draw 85% (£34,000) immediately at an all-in discount rate of 6.75% a year. The NHS trust pays on day 42.
The discount charge is £34,000 × 6.75% ÷ 365 × 42 days = £264.08. If the same invoice had been paid on day 28, the charge would have been £176.05, saving £88.03. Across 100 invoices of this size a year, paying 10-15 days faster or slower swings annual discount charges by roughly £6,300 to £9,400.
Common Pitfalls
- Assuming the quoted percentage is the total cost. A base plus 2.5% quote when base rate is 3.75% means you're paying 6.25% annually, not 2.5%. Always clarify the all-in rate.
- Forgetting discount charges continue if your customer disputes or short-pays an invoice. Some businesses face 90+ days of charges on invoices that eventually get written down or credited.
- Not tracking which customers pay slowly. One customer consistently paying in 75 days versus 35 days doubles your discount charge on their invoices. This data should inform credit terms and pricing.
- Overlooking the reserve charge structure. If a provider charges discount on the full invoice value (not just the advance), your discount cost rises by about a fifth or more (18% at an 85% advance, 25% at 80%) compared to providers charging only on funds advanced.
- Drawing down advances unnecessarily. Taking 85% immediately when you only need 50% means paying discount charges on the extra 35% you don't use. Some providers allow flexible drawdowns to minimise this.
What to Do Next
- Request a worked example from providers showing discount charges on a typical invoice at three payment scenarios (30, 60, 90 days) to compare true costs accurately
- Analyse your aged receivables report to calculate average debtor days by customer. Identify any customers taking 60+ days who are driving up your discount charge costs unnecessarily
- Clarify whether the provider charges discount on the gross invoice value or only the net advance, and whether charges continue during disputes or payment allocation delays
- Model the total annual cost by multiplying your expected monthly advances by the daily discount rate and your actual average debtor days, then add service fees for a complete picture
- Negotiate a volume discount or preferential margin if you have strong financials, valuable debtors like government bodies or FTSE 100 companies, or can demonstrate consistent sub-45 day payment cycles
Related Questions
Is the discount charge tax-deductible?
Yes, discount charges are allowable business expenses deductible against corporation tax as financing costs, similar to bank loan interest. They appear on your profit and loss account as a finance cost. Keep invoices from your provider as evidence for HMRC. This typically reduces the net cost by 19-25% depending on your corporation tax rate and profit level.
Can I reduce discount charges by paying invoices back early?
Yes, if you repay the advance before your customer pays, discount charges stop immediately. Some businesses use invoice finance tactically, drawing funds for 10-15 days to cover a payroll gap, then repaying from other income to minimise charges. However, check for early repayment penalties or minimum charge periods, as some providers require advances to remain outstanding for at least 30 days.
Do discount charges vary between invoices or customers?
The percentage rate is normally consistent across your facility, but the total cost per invoice varies because charges accrue daily. A £50,000 invoice paid in 28 days costs far less than a £20,000 invoice paid in 65 days. Some providers offer lower margins for invoices to blue-chip debtors such as large retailers or the NHS due to lower credit risk, but this isn't standard practice.
Founder & Managing Director, Muswell Rose, founder and PSC of Best Business Loans Ltd
Adam is the founder and managing director of Muswell Rose and a founder of Best Business Loans Ltd, the company behind Market Invoice. He spent over three years as managing director of Penny, a UK invoice finance business, and his career runs through insurance, mortgages, commercial finance and fintech lending. He writes the Market Invoice library.
Last updated: