Custom Software vs SaaS: What Should US Businesses Choose in 2027?

Short answer: Buy SaaS for standard jobs like payroll, email and accounting. Build custom software when the software is part of how you win, when it has to connect many systems, or when you have enough users that renting costs more than owning. In our five-year model, with stated assumptions, building starts to beat a $60-a-seat subscription at roughly 55 to 75 users. Many US businesses end up blending both: they buy the commodity pieces and build the parts that make them different.

Every software decision eventually turns into the same argument. Someone says "just buy a tool, it's $60 a month." Someone else says "we'll outgrow it in a year and we'll be stuck." Both people are usually right about something, and neither has run the numbers.

This guide gives you a way to run them. We cover what changed in 2026, when each option wins, a five-year cost model you can rerun with your own figures, and a one-week checklist for making the call.

Here is our conflict of interest, up front: we build custom software for a living. We also tell clients to buy SaaS when that is the right answer, and this guide says when that is.

The short version: buy, build or blend

What changed in 2026

SaaS bills keep climbing

Zylo's 2026 SaaS Management Index found that 79% of IT leaders saw a price increase at renewal in the past 12 months. The same index puts the average company at about 305 SaaS applications, median spend at $9,455 per employee a year, and about 36% of licenses unused. Vertice's SaaS Inflation Index reports that software price inflation has not dropped below 10% a year in recent years, and its July 2026 report calls June 2026 the highest monthly reading on record.

One caution: Zylo and Vertice both sell tools that help companies cut software costs, so treat their numbers as directional. They also measure different things, which is why per-employee spend benchmarks range from about $7,000 to $9,500 depending on the source. The direction is still hard to miss.

More companies are building instead of buying

McKinsey's State of AI in 2026 survey (1,719 respondents in 97 countries, fielded May 4 to June 8) found that 32% of organizations decided against buying at least one software product or feature because AI coding agents let them build it in-house. The share was 41% in the technology sector, and nearly half among McKinsey's "AI high performers" compared with 31% of everyone else.

Retool's 2026 Build vs. Buy report, a survey of 817 customers and builders taken in late 2025, points the same way: 35% had already replaced at least one SaaS tool with something custom, 78% expected to build more internal tools in 2026, and 60% had built software outside IT oversight in the past year. Retool sells tools for building internal software, so weigh it accordingly.

What the build-instead numbers do not say

McKinsey's figure counts organizations that skipped a purchase. It does not measure how much SaaS spending disappeared, and it does not say the replacements were cheaper to own. About one in ten respondents also reported that cost had constrained their use of coding agents. Independent evidence on how much AI speeds up real development work is still mixed, which we cover in our custom software development cost guide.

Our reading: AI tools have made small internal tools cheaper to build. They have not made owning software free. Someone still has to maintain it, secure it and fix it at 2 a.m.

When SaaS is the right answer

The job is standard

If your accounting works the way everyone's accounting works, do not build accounting software. The same goes for payroll, email, video calls and file storage. Thousands of companies pay for that vendor's engineering, and you share the benefit.

You need to start this month

SaaS wins on time to first value. If you can live with the vendor's workflow, you will be running in days. A custom build takes weeks at the very least, as the next sections show.

You have no one to own it

Custom software needs an owner: someone who decides what changes next, and a team to make the changes. If you cannot name that person, a subscription is the safer choice.

When custom software is the right answer

The software is your edge

If the way you quote, dispatch, schedule or price is what customers pay you for, bending it to fit a generic tool is expensive in a way the invoice never shows. Software that encodes your process becomes an asset competitors cannot buy.

You are connecting many systems

A tool that sits alone is easy to buy. A tool that has to read from your ERP, write to your CRM, and agree with your billing system is mostly an integration project. When integrations dominate the work, building the connecting layer yourself often costs less than the workarounds.

Your seat count is high, or the pricing punishes growth

Per-seat pricing is cheap at 10 users and painful at 200. Usage-based pricing can swing wildly in a busy quarter. The cost model below shows where the crossover sits for a typical case.

You need control of your data

Regulated data, strict residency needs or a hard requirement to export everything in a usable form can push you toward software you control. This is also a reason to read a SaaS vendor's data export terms before you sign, not after.

The cost math: a five-year model you can rerun

Here is a simple model. Every input is an assumption you should replace with your own numbers.

Step 1: Price the SaaS option

Multiply seats by the monthly price by 12, then add a price increase each year. We test two cases: 10% a year, and no increase at all. At $60 per user per month, one seat costs $720 in year one and about $4,396 over five years if prices rise 10% a year. With flat pricing it costs $3,600.

Step 2: Price the custom option

Use the planning bands from our cost guide. A business application typically costs $60,000 to $150,000 to build, and we use $120,000 here. Add yearly upkeep of 20% of the build ($24,000), which sits in the 15% to 25% range vendors commonly plan for, and optionally $6,000 a year for hosting. The upkeep range is a planning convention, not an independent benchmark.

Step 3: Find the break-even

Divide the five-year custom cost by the five-year cost of one SaaS seat. That tells you how many users it takes before building is cheaper.

So at $60 a seat, the crossover sits around 55 to 75 users. With 100 users and 10% yearly increases, the SaaS option costs about $440,000 over five years against $240,000 to $270,000 for the custom build. With 30 users, SaaS costs about $132,000 and the custom build loses by a wide margin. Plug in your own seat price: a $20 tool pushes the break-even to well over 150 users, and a $200 tool pulls it down to around 20.

What the model leaves out

• Capability gaps. We assume the custom build does what the SaaS tool does. Mature products have years of features behind them.

• Switching costs. Moving off a SaaS tool means migrating data and retraining people. Moving onto one means the same later if prices jump.

• Opportunity cost. Engineering time spent on an internal tool is time not spent on your product.

• Value of the edge. If custom software lets you win deals a generic tool cannot, it will not show up in a seat-cost comparison.

The middle path: blend

A SaaS core with a custom layer

This is the most common outcome we see. Keep the SaaS product for the 80% it does well, and build the customer portal, the integrations, or the one workflow it cannot handle. You pay for a small build instead of a large one, and you can still swap the core later.

Platforms and low-code tools

Low-code tools sit between the two. They are fast for internal workflows, and you still pay per seat or per app. Check how you would export your logic and data if you ever leave.

Where AI coding tools fit

They are a good fit for small internal tools with a clear job and a short life. They are a poor fit for anything customer-facing, regulated or long-lived unless a qualified engineer reviews, secures and maintains the result. Our guide to AI agent development for US businesses covers the same build-or-buy trade-off for AI agents, with a worked example.

Risks on both sides

The risks of renting

• Price increases. The renewal data above is the clearest evidence. Ask for caps on yearly increases before you sign.

• Lock-in. Your data and workflows live in the vendor's format. Test the export before you need it.

• Changes you did not choose. Vendors repackage plans, retire features and push bundled add-ons at renewal.

The risks of owning

• Scope creep. A loosely defined build is the most common reason budgets grow.

• Key-person risk. If one developer understands everything, you have a single point of failure. Insist on documentation and code you own.

• Upkeep. Platforms, libraries and security patches keep moving. Budget for them every year, not once.

Tax and accounting differ, too

A SaaS subscription is generally an ordinary operating expense. For custom software, US tax law since 2025 lets companies deduct domestic software development costs right away, while research performed outside the United States is still spread over 15 years. That affects the real saving on an offshore build, and it can change which option wins on an after-tax basis. We explain the details in the software cost guide. Your tax advisor should check how it applies to you. We are an India-based engineering team with a US office in Jenks, Oklahoma, so we would rather you hear it from us.

How to decide in a week

Work through these seven questions with the people who will use the software:

• Is this job the same at every company in our industry, or does it differ in ways customers notice?

• How many people will use it in year one, and in year three?

• Which systems must it connect to, and how clean are their APIs?

• What does the best SaaS product miss, and how much does each missing piece cost us in workarounds?

• What happens if the price rises 15% at renewal? Can we leave in under six months?

• Who will own the software after launch, and who is their backup?

• What rules apply to the data: HIPAA, PCI, state privacy laws, customer contracts?

If most answers point to "standard job, few users, no unusual rules," buy. If they point to "our process, many users, many systems," price a build. If they split, price a blend.

Choosing a partner if you build

• Which roles and how many hours sit behind your quote?

• What is excluded: design, QA, DevOps, project management, third-party fees?

• Who owns the code and the IP from day one?

• What does support cost after launch, and for how long is it included?

• Is there a paid discovery phase before a fixed price?

• Which named people will work on it, and does the contract keep them there?

How Akoode approaches build-or-buy

We will tell you to buy when you should

If a SaaS product covers what you need, we would rather say so in the first call than sell you a build you do not need. Many of our projects start as a blend: we integrate and extend the tools a business already pays for. If you are building a SaaS product to sell, that is a different question, and our guide to how to build a SaaS product covers it.

How we scope and price

We do not publish a rate card. A quote starts with a one-to-two-week discovery that settles the job, the user numbers, the integrations and the risks. It produces a roadmap and a scoped estimate tied to roles and hours, and a clear build-versus-buy recommendation. We work on a fixed-cost, dedicated-team or staff augmentation basis, depending on how settled your scope is. Our engineers are in-house, and you own the IP.

For the overview, see our custom software development company in the USA page, our software development services and our enterprise application development work. Teams in New York can start with software development in New York.

Proof from delivered projects

• We built a subscription-based property and lead platform for a brokerage, with a web dashboard for the office, a Flutter app for agents in the field and subscription billing. Read the case study.

• We built one connected system that runs three retail repair locations and a nationwide mail-in repair operation from a shared backbone. Read the case study.

• For Qualis Construction Ltd., we built an AI quantity takeoff application that replaced manual blueprint counting. Read the case study.

Our Google rating is 4.9 from 126 reviews, and we have delivered 180+ projects across 15+ industries.

Frequently asked questions

Is custom software cheaper than SaaS?

It depends mostly on how many people use it. In our five-year model, with stated assumptions, a $120,000 custom build with 20% yearly upkeep starts to beat a $60-a-seat subscription at roughly 55 to 75 users. Below that, SaaS usually costs less. Capability gaps, switching costs and the value of your own process can move the answer either way.

When should a US business choose SaaS over custom software?

Choose SaaS when the job is standard, such as payroll, email or accounting, when you need to start within weeks, and when you have few users. SaaS also makes sense when no one in your company can own custom software after launch. Negotiate caps on yearly price increases and test the data export before signing.

How much are SaaS prices rising?

Zylo's 2026 index found that 79% of IT leaders saw a price increase at renewal in the past 12 months. Vertice's SaaS Inflation Index reports that software price inflation has not dropped below 10% a year in recent years, and its July 2026 report calls June 2026 the highest monthly reading on record. Both vendors sell cost-cutting tools, so treat the figures as directional.

Can AI coding tools replace my SaaS subscriptions?

Sometimes, for small internal tools. McKinsey's 2026 survey found that 32% of organizations decided against buying at least one software product or feature because they could build it with AI coding agents. That counts skipped purchases, not total savings. Customer-facing, regulated or long-lived software still needs engineering review, security work and ongoing maintenance.

What is a hybrid build-and-buy approach?

A hybrid keeps a SaaS product for the 80% it does well and adds custom software for what it cannot do, such as a customer portal, integrations or one unusual workflow. You pay for a small build instead of a large one, and you can swap the SaaS core later. It is the most common outcome we see.

How long does it take to build custom software to replace a SaaS tool?

Planning figures from our cost guide: a focused internal tool takes about 6 to 12 weeks, a business application 3 to 6 months, and a SaaS-scale platform 6 to 12 months. Integrations and how quickly your team makes decisions set the pace more than coding does. A one-to-two-week discovery phase keeps the estimate honest.

Are there tax differences between custom software and SaaS?

Generally, a SaaS subscription is an ordinary operating expense. For custom software, US tax law since 2025 lets companies deduct domestic software development costs right away, while research performed outside the United States is still amortized over 15 years. That can change the after-tax comparison, so ask your tax advisor how it applies to you.

Get an honest build-or-buy recommendation

If you are weighing a subscription against a build, book a technical consultation. Bring the SaaS quote, the seat count and a list of what the tool misses. We will run the five-year numbers with you and tell you where we think the answer lands, whether or not you end up working with us.