# Data Retention Cost Calculator

> Cost keeping data across storage tiers, at the prices you are charged.

Page: https://freecalculator.tech/tools/data-retention-cost-calculator
Last reviewed: 2026-09-17

## Formula

C = sum over tiers of (Volume_tier x Rate_tier x Months)

- C = sum over tiers of (Volume_tier x Rate_tier x Months).
- Inputs used: Currency, Retention period, Volume on the first tier, Price per TB-month, first tier, Volume on a second tier (optional), Price per TB-month, second tier (optional), Volume on a third tier (optional), Price per TB-month, third tier (optional), and other shown inputs.
- Edge handling: Retention period is required.; Retention period cannot be negative.; Retention period must be no more than 1000000000000.; Volume on the first tier is required.; Volume on the first tier cannot be negative..

## Inputs

- Currency
- Retention period
- Volume on the first tier
- Price per TB-month, first tier
- Volume on a second tier (optional)
- Price per TB-month, second tier (optional)
- Volume on a third tier (optional)
- Price per TB-month, third tier (optional)
- Price as of (optional)
- Price source (optional)

## Worked example: 12 TB hot and 40 TB archive kept for three years

Your own per-tier prices, taken from your bill.
1. Start with Currency: USD, Retention period: 36, Volume on the first tier: 12, Price per TB-month, first tier: 23, Volume on a second tier (optional): 0, Price per TB-month, second tier (optional): 0.
2. Apply the method: C = sum over tiers of (Volume_tier x Rate_tier x Months).
3. Your own per-tier prices, taken from your bill.

## Common questions

### Where does this formula come from?

FinOps Framework capability: unit economics — cost per business unit is total cost for a period divided by the units delivered in the same period; a workload's cost is the sum of its metered components at the rates the organisation is charged. See the source link on this page.

### What kind of calculation is this?

Per-tier volume multiplied by the user's per-TB-month price and the retention period, summed. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### What are its limits?

Arithmetic over the figures entered — it cannot tell whether the underlying metering, logs or job records are complete. A figure from one run or one period is a weak description of ongoing behaviour. The result is only as current as the rates entered; a rate taken months ago is not a current cost. Tiered, committed-use and minimum-spend pricing are not modelled unless the user has already reduced them to the rates entered. Retrieval, early-deletion and request charges are not included unless the user folded them into the rates entered. Growth during the retention period is not modelled here — use the storage growth calculator first.

### How do I use the Data Retention Cost Calculator?

Enter the required values for Currency, Retention period, Volume on the first tier, Price per TB-month, first tier, Volume on a second tier (optional), 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 Data Retention Cost Calculator use?

C = sum over tiers of (Volume_tier x Rate_tier x Months) 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 Data Retention 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.

## 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 data retention cost calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Sources

- The Linux Foundation — https://www.finops.org/framework/capabilities/unit-economics/

## Cite this page

- APA: Free Calculator. (2026, September 17). Data Retention Cost Calculator. https://freecalculator.tech/tools/data-retention-cost-calculator
- MLA: "Data Retention Cost Calculator." Free Calculator, 17 Sept. 2026, https://freecalculator.tech/tools/data-retention-cost-calculator.
- Link: Data Retention Cost Calculator — Free Calculator, https://freecalculator.tech/tools/data-retention-cost-calculator