Invoice Details
📊 Profitability Analysis
In commercial relationships between businesses and self-employed professionals in Spain, providers frequently offer an early payment discount (historically known in continental accounting as Skonto). This clause provides a percentage reduction on the total invoice amount if the client pays the bill within a short timeframe instead of waiting for the regular net payment due date. Deciding whether to take this discount or wait until the end of the term requires calculating the equivalent annual percentage rate (APR/TAE) of the supplier credit.
Under Spanish commercial regulations governed by the Ley 15/2010 de lucha contra la morosidad comercial, the maximum payment term for transactions between companies is capped at 60 days. In this environment, a standard 2.00% discount for paying within 10 days instead of 30 days (which advances the payment by 20 days) represents an annualized interest rate of 37.24% TAE in 2026. This implicit return is significantly higher than the cost of typical business bank lines of credit. If you want to analyze your capital costs or tax treatments, you can use our VAT Calculator or check the yield of your idle cash using the Fixed-Term Deposit Calculator.
⚙️ Early Payment Discount Technical Parameters
To analyze the terms of your commercial invoice, our tool evaluates the following variables:
- Invoice Amount: The total gross amount of the invoice, including all commercial taxes.
- Early Payment Discount: The percentage reduction offered by the supplier for early settlement.
- Days Advanced: The difference in days between the standard net payment date and the early discount deadline.
📊 The Skonto Opportunity Cost Formula
The equivalent annual percentage rate (TAE) of passing up a supplier discount is calculated using this formula:
TAE (%) = (Discount / (100 - Discount)) * (365 / Days Advanced) * 100
This annualized interest rate represents the effective financing rate you pay your supplier by electing to defer payment to the net due date rather than paying immediately.
📈 Practical Examples of Supplier Discounts
Example 1: Standard business supply invoice
- Gross invoice amount: €5,000.00
- Terms: 2.00% discount if paid within 10 days vs. net due at 30 days
- Days payment advanced: 30 days - 10 days = 20 days
- Savings amount: €5,000.00 * 0.02 = €100.00
- TAE calculation: (2 / 98) * (365 / 20) * 100 = 37.24%
- Savings Earned: **€100.00**
- Equivalent Financing Cost: **37.24% TAE**
Example 2: Consulting services invoice
- Gross invoice amount: €12,000.00
- Terms: 1.00% discount if paid within 15 days vs. net due at 45 days
- Days payment advanced: 45 days - 15 days = 30 days
- Savings amount: €12,000.00 * 0.01 = €120.00
- TAE calculation: (1 / 99) * (365 / 30) * 100 = 12.29%
- Savings Earned: **€120.00**
- Equivalent Financing Cost: **12.29% TAE**
⚠️ Common Pitfalls in Commercial Payment Terms
1. Treating the discount percentage as an annual rate
A 2.00% discount might seem small compared to typical bank interest rates. However, because it applies to a short window of time (such as 20 days), its equivalent annualized rate (TAE) is extremely high.
2. Using expensive credit lines to pay early
If the equivalent rate (TAE) of the supplier discount is 12.00% but your bank charges you 15.00% APR to use an overdraft or credit line to advance the payment, you are losing money on the transaction.
3. Missing the discount window deadline
If you process the payment even one day past the supplier’s discount deadline (e.g., day 11 instead of day 10), you forfeit the savings and must pay the full invoice amount.
❓ Frequently Asked Questions (FAQ)
Skonto is the German business term for a cash discount offered to a buyer for settling an invoice within a designated, accelerated payment window.
No. Early payment discounts are voluntary commercial practices. Suppliers use them to accelerate cash inflows, reduce account receivables, and minimize bad debt risk.
Under Spanish tax rules, a cash discount deducted on the invoice directly reduces the taxable base (*base imponible*). The VAT is computed only on the net amount paid.
You should wait if the equivalent TAE of the discount is lower than what you earn by holding the cash in short-term yields, or if your cost of working capital is higher than the discount rate.
If your business is facing a cash crunch, preserving working capital by delaying payments until the net due date is usually wiser than draining cash reserves for early discounts.
Under Spanish GAAP, early payment discounts are recorded in dedicated financial accounts, either as financial income (for the buyer) or financial expenses (for the seller).
⚖️ Professional Disclaimer
The opportunity cost and TAE simulations shown in this tool are commercial estimations. Review details with your accounting department or tax advisor before making corporate payment decisions.