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What AI estimating software really costs

The number on the pricing page is almost never the number on your card. Three things move it: how many people need logins, how much AI you use, and whether the good rate requires paying twelve months up front. Here's what to ask before you subscribe.

Last reviewed: August 2026 · 6 min read

The short version. Compare on total annual cost for your actual crew size, not the advertised monthly rate. Then ask where the pricing data comes from — a national average of other people's jobs, or your own past quotes.

We'll show our own numbers throughout so you can check the math. BuildCraft Pro starts at $59.99/month with unlimited projects (Kim Assistant; Partner $199 and Crew $499 add Kim answering your intake page, follow-ups, and team seats).

The five questions

1

Is it per seat — and what does my third person cost?

Per-seat pricing is normal in software and awkward in construction. Hire a second estimator, or let a lead carpenter look up a number on site, and you pay more for the same jobs. Plans in this category commonly ship with a seat cap — two users, or five — and going past it means the next tier, not a small add-on.

Ask for the price at the crew size you'll have in a year, not today's. And ask whether a read-only login for a bookkeeper or a project manager still counts as a seat.

Ours: no percentage games: one account runs the business, extra team seats are a flat $19/mo each, and Kim + Crew ($499) includes 3.
2

Is the AI metered — and what happens when I run out?

Some tools include a monthly allowance of AI runs, often called credits. An entry plan might come with 50. That sounds generous until you're mid-bid in your busiest month.

Get specific: what consumes one credit — a whole estimate, each revision, each blueprint page? What happens at zero: does it stop, or does it bill you? Do unused credits roll over? Metering quietly makes your busiest month your most expensive software month, which is exactly backwards.

Ours: no credit math. Every plan includes a monthly AI allowance sized so normal use doesn't hit it — no API key to set up, nothing to meter yourself. Power users can plug in their own OpenAI or Anthropic key anytime and pay the provider directly at cost; we don't mark that up.
3

Is that monthly price actually monthly?

A lot of headline rates are the annual-prepay rate. The month-to-month figure can be 20–25% higher, which you find out at checkout. That's a legitimate discount, not a trick — but it means the number you compared wasn't the number you'd pay unless you commit for a year on a tool you've used for a week.

Ask for both figures, and ask what happens to your data and your estimates if you stop paying mid-term.

Ours: Kim Assistant is $59.99 month-to-month, cancel anytime ($599/year = two months free). The higher tiers buy more of Kim's work — Partner ($199) answers your public intake page and follows up on quiet estimates, Crew ($499) adds 3 seats and white-glove setup — not paywalled versions of the same features.
4

Where do the prices come from — a national average, or my numbers?

This is the question that decides whether the estimates are usable, and it gets asked least.

One approach prices from a large dataset of past projects across the country. You get a plausible number in seconds, and it reflects other contractors' costs in other markets. That can land close, or it can be badly wrong for your city, your suppliers, and your crew — and "badly wrong" cuts both ways: a number that's too high loses you the job and makes you look unserious, one that's too low you have to eat.

The other approach learns from your own past quotes: the prices you've actually charged and won work with.

Either way — and this matters more than which approach — check every AI number against your own costs before it goes to a client. Any tool that discourages you from doing that is selling confidence, not estimating.

Ours: upload one of your own past quotes and say "learn my style." It keeps your section order, wording and units, and uses your real line prices as the anchors for every estimate it builds afterwards. Your standard inclusions and exclusions get saved too. If you'd rather it just copy a quote verbatim, it does that instead and never touches your numbers.
5

What do I still have to buy separately?

Estimating is one job on a job. Ask which of these are included, which are an add-on, and which need a second subscription: proposals and e-signature, invoicing, change orders, scheduling, budget vs. actual cost tracking, time and crew tracking, a client portal, accounting export, and offline access for sites with no signal.

A cheap estimating tool plus three other subscriptions is not cheap, and moving data between them by hand is where jobs get mispriced.

Ours: all of the above is included on every plan, including scheduling, budget vs. actual with a live margin, time and crew tracking with a job-site clock-in kiosk, and full offline use. No modules, no add-ons.

The math for a three-person crew

Say you're a small GC: you, an estimator, and a lead who needs to look things up on site. Three logins. Here's how the two pricing models diverge over a year — the per-seat column uses a $149/month entry plan capped at two users, with a $299/month tier to get past the cap, which is a shape you'll see often in this category.

Year onePer-seat + metered AIBuildCraft Pro
Plan needed for 3 usersNext tier up (2-user cap)Base plan
Monthly rate$299from $59.99
Twelve months$3,588$719.88
Extra AI usage in busy monthsPossible — depends on creditsPaid to your AI provider, typically a few dollars
Year one, before AI usage$3,588$719.88
Difference$2,868 — about four months of a truck payment

Two honest caveats on that table. First, plans and prices change constantly, so get current numbers from whoever you're comparing — we're showing a shape, not a quote on their behalf. Second, a higher price can absolutely be worth it: if a tool's estimates land closer for your trade, saving one mispriced job pays for years of subscription. Cost is one input, not the answer.

The one number to write down. Total annual cost, at the crew size you'll have in twelve months, including a busy month's AI usage, on month-to-month terms. Every tool can look cheap on some other basis.

What we'd tell you to do

  1. Bid a job you already know the answer to. Take a project you finished and know the real costs of, run it through the tool, and compare. This tells you more in twenty minutes than any review site.
  2. Do it on month-to-month terms. Don't prepay a year to find out.
  3. Price it at next year's crew size. Growth shouldn't be a billing event.
  4. Check the AI's numbers by hand the first few times. Then you'll know how much to trust it, which is the only thing worth knowing.

Frequently asked questions

Why is estimating software priced per user?

It's a standard software model that fits construction badly — you pay more for the same jobs because a second person needs to see a number. Plans in this category often cap seats at two or five. Ask what your third and fifth user cost before you subscribe.

What's an AI credit?

A metered allowance of AI runs, often 50/month on entry plans. Ask what consumes one, what happens when you hit zero mid-bid, and whether they roll over. Metering makes your busiest month your most expensive software month.

Is bring-your-own AI key better or worse?

Honestly, both. Better on cost and on transparency — you pay the AI provider directly at their rates, with no reseller margin and nothing metered. Worse on setup: it's a real extra step at signup, and it's the main reason someone might prefer an all-inclusive plan. Worth knowing which trade-off you're making rather than discovering it later.

How accurate is AI estimating?

Good enough to save hours, not good enough to send unchecked. It's excellent at not forgetting scope and at structuring a bid fast; it can be well off on prices, especially with national-average data in a local market. Treat the output as a complete first draft you price-check, not a finished bid. We put that warning in the product itself, next to the AI, on purpose.

Try it on a job you already know

Run a project you've finished through it and compare against your real costs. 14-day free trial — $0 today, plans from $59.99/mo.

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Keep reading Markup vs. margin: why a 20% markup is not 20% profit → How to write a construction estimate, step by step → All software comparisons →
General buying guidance for contractors. The price shapes described here ($149/month entry tiers, two- and five-user caps, 50-credit AI allowances) are patterns commonly seen in this software category as of August 2026 and are used to illustrate how the models work — they are not a quote on any other company's behalf, and no specific product is being described. Plans and prices change often; get current figures directly from any vendor you're comparing, including us.