Enter voucher and cart details
Formula used
How to use this calculator
- Enter your order subtotal and shipping cost. Add the real cart numbers for accuracy.
- Choose a voucher mode, then fill the matching value field. Percent uses Discount percent; amount uses Discount amount.
- Add caps, minimum order, and shipping eligibility if needed. These are the most common reasons totals differ.
- Set tax rate, and select whether tax applies before or after discounts. Local rules vary, so check your receipt.
- If you pay to obtain the voucher, enter voucher cost and any fees. Net benefit shows if it’s actually worth it.
Why voucher value differs from face value
A voucher’s headline value is rarely the value you actually receive. Eligibility rules can block it completely, while caps can limit the benefit on larger baskets. This calculator converts headline terms into a cash-equivalent benefit by modeling checkout totals with and without the voucher. It also separates immediate reductions at checkout from post-purchase rewards, so you can judge true savings for your specific cart. It supports quick decisions for buyers, marketers, and finance.
Key inputs that change the applied benefit
Start with the order subtotal and shipping, because they define the eligible base for percent and amount offers. If shipping is excluded, the discount base becomes subtotal only. Percentage offers use EligibleBase × Percent, while amount offers are limited to the eligible base so discounts never exceed what you can pay. A minimum order threshold can make the applied value drop to zero instantly.
Tax timing and shipping taxation effects
Tax rules create meaningful differences in real-world savings. When tax is applied after discounts, a coupon can reduce the taxable base and lower tax. When tax is applied before discounts, the tax stays the same and the voucher only reduces the post-tax total. Some regions tax shipping; others do not. By toggling tax-on-shipping and tax timing, you can mirror common receipts and spot overestimated savings.
Paid vouchers, fees, and break-even pricing
If you buy a gift card, store credit, or a “deal” voucher, acquisition cost matters. The calculator adds percentage and fixed fees to estimate total cost. Net Benefit equals Savings minus Total Voucher Cost, and the break-even price equals the savings produced by the offer. The effective discount rate shows net benefit as a share of the baseline total, helping teams compare offers across different basket sizes.
Using exports for audit-ready comparisons
The CSV export captures key fields such as baseline total, tax, out-of-pocket cost, and net benefit, making it easy to compare multiple vouchers in a spreadsheet. The PDF export provides a clean snapshot for approvals, refunds, or procurement records. Save one export per scenario, then adjust caps, taxes, and fees to quantify how small rule changes shift profitability over time.
FAQs
What does “Net Benefit” represent?
Net Benefit is your savings compared with paying normally, minus any voucher purchase cost and fees. A positive value means the voucher improves your outcome for the same cart scenario.
How is cashback handled?
Cashback typically does not reduce checkout due. The calculator keeps the checkout total unchanged and treats cashback as a post-purchase benefit, so Savings equals the cashback value.
Why does tax timing change the result?
If tax is calculated after a coupon, the taxable base can shrink and tax drops. If tax is calculated before discounts, tax stays the same and the voucher only reduces the final total.
What does a cap do for percentage offers?
A cap limits the maximum discount or cashback you can receive. The calculator applies the smaller of the computed value and the cap, so large baskets don’t inflate the benefit unrealistically.
Why might store credit be “used” less than its face value?
Store credit is applied like payment at checkout, so it cannot exceed what you owe. The tool limits used credit to the checkout amount, preventing inflated savings.
Can I download CSV or PDF without calculating?
Downloads use the most recent calculated scenario stored in your session. Run a calculation first, then export. If you reset the browser session, calculate again to refresh the downloads.
Example data table
| Scenario | Cart | Voucher | Key rule | Typical takeaway |
|---|---|---|---|---|
| Percent coupon with cap | $120 subtotal, $10 shipping, 8% tax | 20% off, cap $15 | Tax after discount | Cap limits savings even on bigger carts. |
| Store credit bought at discount | $80 subtotal, $5 shipping, 7% tax | $50 credit, cost $45 | Credit applies after tax | Buying credit can be profitable with enough spend. |
| Cashback with platform fee | $200 subtotal, $0 shipping, 10% tax | 5% cashback, fee 2% | Cashback doesn’t reduce checkout | Fees reduce reward; compare net benefit carefully. |