Deciding Between Making or Buying: Relevant Costs Analysis

Every business faces a fundamental question that can significantly impact its profitability and operations: should we make this product ourselves or buy it from someone else? This make-or-buy decision is one of the most common challenges companies encounter, from small startups deciding whether to outsource their marketing to large manufacturers choosing between in-house production and external suppliers. Understanding how to analyze these decisions using relevant costs can mean the difference between maximizing profits and missing out on significant savings.

What exactly is a make-or-buy decision? 🔗

A make-or-buy decision is essentially a choice between producing goods or services internally within your organization versus purchasing them from external suppliers. Think of it like deciding whether to cook dinner at home or order takeout – you’re weighing the costs, benefits, and practicalities of each option.

Companies face these decisions daily across various aspects of their operations. A software company might decide whether to develop an accounting system in-house or purchase one from a vendor. An automobile manufacturer might choose between producing car seats internally or buying them from a specialized supplier. Even service businesses make these choices – a consulting firm might decide whether to hire full-time graphic designers or outsource design work to freelancers.

The complexity of these decisions increases when you consider that they’re not just about immediate costs. They involve long-term strategic implications, quality considerations, and operational flexibility that can affect your business for years to come.

The foundation: Understanding relevant costs 🔗

Before diving into the decision-making process, we need to understand what costs actually matter in this analysis. Not all costs are created equal when making make-or-buy decisions – some are relevant, while others are irrelevant to the decision at hand.

Variable costs: The costs that change 🔗

Direct materials and labor: These are typically the most obvious relevant costs. If you’re making a product, you’ll need raw materials and workers. If you’re buying it, you’ll pay the supplier’s price, which includes their materials and labor costs plus their profit margin.

Variable overhead: These include costs like electricity for machinery, supplies, and other expenses that increase with production volume. When you outsource, you eliminate these variable costs from your internal operations.

Fixed costs: The tricky ones 🔗

Fixed costs require more careful consideration. Some fixed costs are relevant, while others aren’t:

Avoidable fixed costs: These are fixed costs you can eliminate if you choose the “buy” option. For example, if you can sell equipment or reassign specialized staff to other profitable activities, these represent real savings.

Unavoidable fixed costs: These are costs you’ll incur regardless of your decision. Your factory rent, for instance, might continue whether you produce the item internally or not. These costs are irrelevant to the make-or-buy decision because they don’t change based on your choice.

The cost comparison framework 🔗

Let’s walk through a practical framework for comparing costs. Imagine you run a furniture company currently making wooden chairs in-house, and you’re considering buying them from a supplier instead.

Calculating the cost to make 🔗

Start by identifying all relevant costs of internal production:

Direct materials: Wood, screws, varnish – typically $25 per chair

Direct labor: Workers’ wages for chair assembly – $15 per chair

Variable overhead: Power, supplies, machine maintenance – $8 per chair

Avoidable fixed costs: If you stop making chairs, you could rent out the workshop space for $2,000 monthly. If you produce 1,000 chairs monthly, that’s $2 per chair in opportunity cost

Total relevant cost to make: $25 + $15 + $8 + $2 = $50 per chair

Calculating the cost to buy 🔗

This is usually more straightforward – it’s typically the supplier’s quoted price plus any additional costs like shipping, inspection, or storage. Let’s say the supplier quotes $45 per chair, plus $3 shipping and handling.

Total cost to buy: $45 + $3 = $48 per chair

In this example, buying appears $2 cheaper per chair than making internally. However, this is just the beginning of the analysis.

Beyond the numbers: Qualitative factors 🔗

While cost analysis provides crucial quantitative data, several qualitative factors can significantly influence the final decision:

Quality control and standards 🔗

When you manufacture internally, you maintain direct control over quality standards and processes. You can implement quality checks at every stage and make immediate adjustments when issues arise. With external suppliers, you’re dependent on their quality control systems, which might not align perfectly with your standards.

Consider a premium furniture maker known for exceptional craftsmanship. Even if outsourcing saves money, any compromise in quality could damage their brand reputation and long-term profitability.

Supply reliability and flexibility 🔗

Internal production offers greater control over timing and scheduling. You can prioritize urgent orders, adjust production schedules, and respond quickly to demand changes. External suppliers might have their own priorities, longer lead times, or limited flexibility to accommodate rush orders.

However, suppliers often provide benefits like backup capacity during peak demand periods or specialized expertise that would be expensive to develop internally.

Strategic and confidentiality considerations 🔗

Some processes involve trade secrets, proprietary technologies, or strategic capabilities that provide competitive advantages. A company might choose to keep production internal to protect these secrets, even if outsourcing appears cheaper.

For example, a beverage company might never outsource the production of their signature flavor concentrate, regardless of cost savings, because the recipe is central to their competitive advantage.

Common pitfalls to avoid 🔗

Including irrelevant costs 🔗

Many managers mistakenly include all overhead costs in their analysis. Remember, only costs that will change based on your decision are relevant. Don’t penalize the “make” option by allocating fixed costs that will continue regardless of your choice.

Ignoring opportunity costs 🔗

When you choose to make something internally, you’re using resources that could potentially be deployed elsewhere. If those resources could generate profit in alternative uses, this opportunity cost should factor into your analysis.

Focusing solely on short-term costs 🔗

Make-or-buy decisions often have long-term implications. A supplier offering attractively low prices today might raise prices once you’ve eliminated your internal capability. Consider the total cost of ownership over several years, not just immediate expenses.

Making the decision: A balanced approach 🔗

Effective make-or-buy decisions require balancing quantitative cost analysis with qualitative strategic considerations. Start with the numbers – calculate relevant costs accurately and compare them fairly. Then layer in the qualitative factors that matter to your specific situation.

Sometimes the decision is clear-cut: if buying costs significantly less and meets all your quality and reliability requirements, outsourcing makes sense. Other times, the quantitative analysis might favor one option while strategic considerations point toward another.

Consider creating a decision matrix that weights both financial and strategic factors according to their importance to your business. This approach helps ensure you’re not overlooking crucial elements that could affect long-term success.

Remember that make-or-buy decisions aren’t necessarily permanent. Market conditions change, supplier capabilities evolve, and your business priorities shift. Regularly reassess these decisions to ensure they continue serving your best interests.

What do you think? Have you encountered situations where the cheapest option wasn’t necessarily the best choice? How might you balance cost savings against strategic control in your own business decisions?