Compare price, payment fees, sales mix and operational savings. Start with a completed job sheet, supplier quotes and a crew schedule. Each example below uses hypothetical values you can replace.
Payment Fee Gross-Up
Find the charge needed to retain a chosen amount after payment processing.
Charge = (required receipt + fixed fee) / (1 − percentage fee)
Show example inputs and result
| Required net receipt | 500 |
|---|---|
| Processor fee | 2.9 % |
| Fixed transaction fee | 0.3 |
Result: 515.242 .
The percentage fee applies to the final charge. This arithmetic does not determine whether surcharging is permitted.
Open payment fee gross-upPrice Needed After Cost Inflation
Reprice work when supplier or delivery costs rise.
New price = cost × (1 + increase) / (1 − margin)
Show example inputs and result
| Current assigned cost | 600 |
|---|---|
| Cost increase | 8 % |
| Required margin | 30 % |
Result: 925.7143 .
Enter a weighted increase across the costs included. This is a target-margin calculation, not a demand forecast.
Open price needed after cost inflationTwo-Service Sales Mix Margin
Check how the mix of two services changes total contribution margin.
Combined margin = (total revenue − total variable cost) / total revenue × 100
Show example inputs and result
| Revenue from service A | 12,000 |
|---|---|
| Variable cost of service A | 6,000 |
| Revenue from service B | 8,000 |
| Variable cost of service B | 6,000 |
Result: 40 %.
Weight by revenue; a simple average gives the smaller service too much influence. Fixed overhead is excluded.
Open two-service sales mix marginOwner Earnings per Hour
Include unpaid administration when evaluating what the business earns for its owner.
Owner return = (revenue − costs excluding owner pay) / owner hours
Show example inputs and result
| Period revenue | 15,000 |
|---|---|
| All costs excluding owner pay | 10,000 |
| Owner delivery and admin hours | 180 |
Result: 27.7778 per owner hour.
Include selling, travel and administration. This is pre-tax return and does not value invested capital.
Open owner earnings per hourError Prevention Break-Even
Find how many costly mistakes a control needs to prevent.
Errors to prevent = ceiling(prevention cost / cost per error)
Show example inputs and result
| Monthly prevention cost | 500 |
|---|---|
| Fully assigned cost per avoidable error | 125 |
Result: 4 errors per month.
Use avoidable cash or capacity costs. Do not count theoretical opportunity revenue as collected revenue.
Open error prevention break-evenProfit from a Cost Reduction
Compare an operating saving with the cost of implementing it.
Net recurring improvement = spend × saving rate − implementation cost
Show example inputs and result
| Current recurring spend | 10,000 |
|---|---|
| Expected saving | 8 % |
| Monthly implementation cost | 200 |
Result: 600 per period.
Only the affected spend is reduced. Include implementation and service-quality impacts separately.
Open profit from a cost reductionUse the results in your plan
For a locksmith business, review hardware, dispatch time, and travel across the complete workflow. Use one consistent period and delivery unit: a callout. Compare the assumptions with recorded outcomes after delivery, then update the estimate.
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