Outsourcing vs In-House Cost Calculator

1. Define what each option must deliver

Write a short scope before entering costs. Include the work, channels, required skills, coverage hours, tools, output standards, escalation limits and reporting. Specify whether you are buying dedicated time, shared coverage, completed tasks or an outcome-based service.

A shared inbox service and a dedicated employee may provide different availability, continuity and control. They should not be treated as equivalent simply because their monthly totals look similar. Record those differences beside the cost comparison.

Choose a comparison period, such as twelve months. Separate one-time setup costs from ongoing monthly costs, and identify which internal expenses would actually disappear if work moved outside the business.

2. Build the full in-house cost

Start with pay and employer costs. The US Bureau of Labor Statistics separates wages and salaries from benefits in its Employer Costs for Employee Compensation program. That is a useful reminder to look beyond salary; its national averages are context, not a substitute for your own role, location and payroll data. [S3]

Add recruitment, onboarding, equipment and any role-specific software or facilities. Include the manager’s time if it is material. If benefits or payroll figures already include paid leave, do not add the same cash expense again. Reflect non-working paid time in the capacity calculation instead.

Allocate shared expenses consistently. A manager who will remain employed either way may represent internal time consumed rather than a cash saving. Keeping those two concepts separate makes the decision more credible.

3. Build the full outsourced cost

Use the provider’s written scope to identify what the base fee includes. Then add applicable tools, usage, setup, client onboarding, internal oversight, overages and other charges. Include taxes or currency-conversion costs where they genuinely apply to your comparison.

Confirm what happens during absence, training, increased volume and scope changes. Ask who owns the data and documentation and what it would take to transfer the work later. Do not assume all management, QA or replacement coverage is included unless the agreement says so.

4. Complete the cost worksheet

Enter zero only when a category genuinely does not apply. Use a separate “unknown” note for items awaiting a quote; do not let missing inputs silently become zero.

This worksheet is available as an editable version below. Go to the worksheet

5. Calculate costs on the same basis

For each option, recurring monthly cost equals the sum of all recurring inputs. One-time cost equals the sum of setup, onboarding and other one-time inputs. For a comparison period of M months:

A positive difference means the outsourced scenario costs less in this model. A negative difference means it costs more. If in-house total cost is zero or unknown, do not calculate a percentage. The result should show “not available” rather than a misleading value.

Worked example with fictional inputs

The following illustration uses USD, a twelve-month period and matched scope with 120 productive hours per month for each option. The capacity assumption exists only to demonstrate the arithmetic; verify it separately for a real decision.

In this fictional scenario, the difference is $23,940 over twelve months, or 36.94% of the in-house total. These are modeled cost differences, not a forecast of cash savings. Some internal costs may remain, and actual scope or productive capacity may differ.

6. Compare productive capacity

Paid hours and usable delivery time are different measures. Estimate productive hours after leave, training, meetings, administration and other unavailable time. Keep that definition consistent for both options.

For illustration, 160 paid hours with 25% unavailable for delivery leaves 120 productive hours. This is a planning assumption, not a recommended or standard utilization level. If a provider sells task outputs or shared coverage, do not invent dedicated hours; compare accepted output or matched coverage instead.

Use a quality-adjusted measure when the work can be counted reliably. For example, cost per accepted task is total relevant cost divided by tasks accepted without further rework. Define acceptance first and compare equivalent task difficulty. Cost per lead alone says little if qualification standards differ.

7. Test the assumptions that matter

Change the largest uncertainties one at a time: volume, retained management time, training cost, productive capacity and overages. A low, expected and high workload scenario is usually more useful than one precise-looking estimate.

Calculate cash impact separately. Include only expenses that actually stop and new expenses that begin, with their timing. Treat existing employee time freed for other work as capacity released unless payroll or another cash expense genuinely falls.

If the outsource scenario has higher one-time costs but lower recurring costs, simple cost crossover in months equals the extra one-time cost divided by the recurring monthly cost advantage. Use this only when that advantage is positive. Round up to a whole month and state that it excludes timing, financing and changing volumes.