SLA Cost Calculator
Cost the coverage a service level agreement promises.
In short
Cost the coverage a service level agreement promises.
Formula: SLA cost = Covered hours × People on duty × Loaded rate + Standby hours × Standby rate + Tooling; Cost per covered hour = SLA cost ÷ Covered hours
What this calculator does
Coverage, staffing and rates are entered by the organisation; standby is costed only when both standby hours and a standby rate are given.
Use it to turn Currency, Covered hours each month, People on duty during covered hours, Loaded cost per staffed hour, and the other shown inputs into a checked result you can compare, copy, or rerun with different assumptions.
The page shows the formula, a numeric worked example, and the assumptions that affect this professional & industry calculation.
Inputs and what they mean
- Currency
- — Amounts are shown in the currency you pick. No exchange rate is applied..
- Covered hours each month
- — For example 730 for 24/7, or 176 for business hours..
- People on duty during covered hours
- — number value.
- Loaded cost per staffed hour
- — number value.
- Standby hours each month
- — Optional component. Leave at 0 to exclude it from the result..
- Standby pay per hour
- — Optional component. Leave at 0 to exclude it from the result..
- Monthly monitoring and tooling cost (optional)
- — Optional component. Leave at 0 to exclude it from the result..
How to use it
- Enter your own figures — the calculator never fills in a rate, price or benchmark for you.
- Press Calculate to see the result.
- Read the formula, variables, assumptions and source below the result before you rely on it.
Formula
SLA cost = Covered hours × People on duty × Loaded rate + Standby hours × Standby rate + Tooling; Cost per covered hour = SLA cost ÷ Covered hours.
Inputs used: Currency, Covered hours each month, People on duty during covered hours, Loaded cost per staffed hour, Standby hours each month, Standby pay per hour, Monthly monitoring and tooling cost (optional).
Edge handling: Covered hours each month is required.; Covered hours each month cannot be negative.; Covered hours each month must be no more than 1000000.; People on duty during covered hours is required.; People on duty during covered hours cannot be negative..
Worked example
24/7 cover with one person on duty
- Start with Currency: USD, Covered hours each month: 730, People on duty during covered hours: 1, Loaded cost per staffed hour: 70, Standby hours each month: 160, Standby pay per hour: 12.
- Apply the method: SLA cost = Covered hours × People on duty × Loaded rate + Standby hours × Standby rate + Tooling; Cost per covered hour = SLA cost ÷ Covered hours.
- Standby is counted only when you enter standby hours and pay.
Reading the result
The headline figure is the main answer. Any breakdown underneath shows the parts that make it up, so you can check the working and see what changes when you adjust an input.
Limitations and assumptions
- Inputs outside the supported range are rejected rather than forced into a result.
- The result depends on the values you enter for this sla cost calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.
Reference: Rice University — Principles of Accounting, Volume 2: Managerial Accounting
Last reviewed:
Common questions
Where does this formula come from?
OpenStax, Principles of Accounting Volume 2: Managerial Accounting — job order costing, cost-plus pricing, margin and markup. See the source link on this page.
What kind of calculation is this?
Coverage is costed as staffed hours, with optional standby pay and tooling added. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.
What are its limits?
Costs coverage, not the probability of meeting a response target; that needs demand modelling. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.
How do I use the SLA Cost Calculator?
Enter the required values for Currency, Covered hours each month, People on duty during covered hours, Loaded cost per staffed hour, Standby hours each month, and the other fields shown. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.
What formula does the SLA Cost Calculator use?
SLA cost = Covered hours × People on duty × Loaded rate + Standby hours × Standby rate + Tooling; Cost per covered hour = SLA cost ÷ Covered hours The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.
Can the SLA Cost Calculator be used for exact decisions?
Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.
Formula, source and verification
Coverage is costed as staffed hours, with optional standby pay and tooling added.
The question it answers: What does it cost each month to staff the cover our SLA promises?
The formula
SLA cost = Covered hours × People on duty × Loaded rate + Standby hours × Standby rate + Tooling; Cost per covered hour = SLA cost ÷ Covered hours
- H — Covered hours per month
- (h). Hours the service level has to be met.
- p — People on duty
- (count). People required during covered hours.
- r — Loaded cost per staffed hour
- (currency/h). Employer cost per hour on duty.
- Hs — Standby hours
- (h). Optional standby hours each month.
- rs — Standby rate
- (currency/h). Optional standby pay per hour.
- S — Tooling cost
- (currency). Optional monitoring and tooling cost.
Units: Hours; counts; currency per hour; currency.
What kind of calculation this is
Deterministic formula. The same inputs always give the same answer. The maths is fixed and does not depend on judgement.
Method
Coverage, staffing and rates are entered by the organisation; standby is costed only when both standby hours and a standby rate are given.
Assumptions built into the result
- Mathematical: Staffing is constant across covered hours.
Figures this calculator will never guess for you
- No industry-average rate, margin, overhead or ticket volume is inserted.
- No optional component is filled in on the user's behalf.
- No standard shift pattern or standby premium is assumed.
Limitations
- Costs coverage, not the probability of meeting a response target; that needs demand modelling.
Source and version
- Standard or reference
- Cost accumulation, cost-plus pricing, margin and markup (OpenStax, Principles of Accounting Volume 2: Managerial Accounting — job order costing, cost-plus pricing, margin and markup.)
- Published source
- Rice University — OpenStax (CC BY)
- Formula version
- Version 1
- Verification
- Reviewed against the cited source on
- How much weight the source carries
- Academic
- Applies to
- Currency
- Amounts stay in the currency you choose; no exchange rate is applied.
Cite this page
Free Calculator. (2026, September 16). SLA Cost Calculator. https://freecalculator.tech/tools/sla-cost-calculator
"SLA Cost Calculator." Free Calculator, 16 Sept. 2026, https://freecalculator.tech/tools/sla-cost-calculator.
SLA Cost Calculator — Free Calculator, https://freecalculator.tech/tools/sla-cost-calculator
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