Colorado · Agentic SaaS development

SaaS Development for Colorado Founders Ahead of the 2027 Tax Change

A SaaS product priced for Colorado customers today may be priced wrong on January 1, 2027. Under current Department of Revenue guidance, hosted software is not subject to state-administered sales tax. HB26-1223 changes that for sales on or after that date, and Denver already taxes SaaS under its own rules. For a subscription business, that can mean tax lines on invoices, a billing system that knows where each customer uses the product, and contract terms that affect whether a sale is taxable.

Curiosive builds SaaS products from Ankara, Türkiye, with AI coding agents working under the review of senior engineers. Engineers design the multi-tenant data model, billing webhooks and plan logic. Agents produce the CRUD screens, admin views, migrations and test suites around them. Work runs as AI-accelerated development, starting from $2,000 per month, with scope agreed in writing.

Start a partnership From $2,000 per month

24: published portfolio projects
5+: years building for production
12: countries the work runs in
100%: of code read by a senior engineer
1 day: to hear back, from the engineer

For US founders and product teams

A US company. An engineering partner you can keep.

Curiosive LLC is our US-registered company. Engineering is led from Ankara, Türkiye, with collaboration across European and US time zones. Your engagement starts with a written scope, monthly capacity and a clear delivery plan.

Know who you hire

Curiosive LLC provides the services. Our US company details and service terms are published, and pricing is in USD.

Know what will ship

Agree scope, capacity and start date before checkout. Work through a prioritized queue, with senior engineers reviewing changes before they reach production.

Keep ownership

Typed, tested and documented code, with no lock-in to our tooling. Define repository access, handover and the working-hour overlap during discovery.

Explore our US partnership →Book a 30-minute intro call →Discuss your product →Service terms

Colorado sales tax on SaaS: the rule now and from January 2027

Department of Revenue guidance revised in February 2021 says state-administered sales tax applies to software only when it is prepackaged, under a tear-open nonnegotiable license and delivered on a physical medium, so hosted SaaS and electronic downloads are not taxable. That guidance reflects the law until HB26-1223's software changes apply, and it does not apply to home-rule cities. HB26-1223, signed June 4, 2026, makes computer software taxable for sales on or after January 1, 2027, defining it as code delivered by any means, including download or remote access through the internet, and including phone and tablet apps. Only software developed for a particular user, or governed by an individually negotiated license signed by both parties, stays exempt. Click-through, browse-wrap, account-creation and website-terms acceptance do not qualify. Local governments whose taxes the state collects take on the change only through a local election. The state rate is 2.9%.

Remote seller nexus in Colorado and Denver's own SaaS tax

In South Dakota v. Wayfair, decided June 21, 2018, the Supreme Court overruled the physical-presence rule for sales tax collection. A retailer with no physical location in Colorado must get a sales tax license and collect state and state-administered local sales tax once its retail sales into the state exceed $100,000 in the current or previous calendar year. All retail sales count toward that figure, taxable or not, so a SaaS company can cross it in 2026 while its sales are still exempt. Collection must start by the first day of the first month at least 90 days after crossing. Home-rule cities collect their own taxes separately. Denver's 2026 Tax Guide Topic No. 18 taxes software programs, software as a service, license fees and maintenance agreements, and charges attributable to use in Denver are subject to Denver use tax even when the servers sit outside the city. Billing therefore needs a usage location per customer, not just an address. Rates and filings are worth confirming with an accountant.

One-step online cancellation for subscriptions sold in Colorado

Since August 6, 2025, SB25-145 has required a business offering an automatic renewal contract to Colorado consumers to provide a simple, timely, easy-to-use and readily accessible way to cancel. It is deemed to comply when a customer who signed up online can cancel through a one-step online link available immediately after reasonable authentication. A discounted offer, retention benefit or explanation of what cancelling means may appear only if a prominent direct link to cancel is shown at the same time, and the cancellation must then be processed promptly. Since February 16, 2026 the protections cover any person, not only individuals buying for personal or household purposes, which matters for B2B plans. In the product, the cancel action lives in account settings, calls the payment provider, and the resulting event is handled idempotently so access ends on the right date even if a webhook arrives twice.

Tenant isolation, billing state and what agents build around them

The hard parts of a SaaS product stay with engineers: a multi-tenant data model where every query is scoped to a tenant, plan and entitlement logic read from one source of truth, and billing webhooks that treat the payment provider's events as authoritative and never process the same event twice. Colorado adds to that core: a taxability flag per plan, a usage location per customer for Denver, and a record of whether a contract was individually negotiated and signed by both parties. Around it, an engineer writes scoped tasks and Claude Code or Cursor produces the CRUD screens, admin views, migrations and test suites, running the type checker, linter and tests before a senior engineer reviews every diff. Our SaaS work includes PicKey (pickey.ai), a visual password manager with subscription billing, Reveal Software (reveal.software), personal video onboarding built on Hono, Drizzle ORM and PostgreSQL, and per-title entitlement for Inspire Film (inspire.film).

Proof

Published project examples

Reveal Software

Release Coach AI

Inspire Film

Poppin

Zing Coach

ChurchBee

AI-accelerated development

from$2,000

per month

Senior engineers building your product with AI coding agents: web, mobile, SaaS or browser extension, reviewed before anything ships.

Web, mobile, SaaS and browser extensions
AI-assisted delivery under senior engineer review
Scope and capacity agreed in writing, renews monthly

AI-accelerated development, billed monthly. We confirm scope, capacity and start date in writing before checkout.

Questions

The things people ask before starting.

Is SaaS taxable in Colorado in 2027?

Yes, for sales on or after January 1, 2027 under HB26-1223, at a state rate of 2.9%. Until then, hosted SaaS is not subject to state-administered sales tax under Department of Revenue guidance. Software developed for a particular user, or sold under an individually negotiated license signed by both parties, stays exempt; click-through terms do not qualify.

When does an out-of-state SaaS company have to collect Colorado sales tax?

Once its retail sales into the state exceed $100,000 in the current or previous calendar year. All retail sales count, taxable or not, and collection must start by the first day of the first month at least 90 days after crossing. Home-rule cities such as Denver run their own taxes separately.

Can a SaaS startup in Colorado use the Advanced Industry Investment Tax Credit?

Its investors can, if the company is certified. They get a state income tax credit of 25% of an investment of $10,000 or more, 35% in an enterprise zone or rural county, capped at $100,000. The company needs its headquarters or at least half its employees in Colorado, under $10 million raised, and under $5 million in revenue or under five years of revenue. The annual pool drops to $2.5 million from 2027.

How do we work with a SaaS studio in Türkiye from Colorado?

Mostly in writing, since Ankara sits 9 or 10 hours ahead depending on the season and ordinary office hours in the two places never coincide. Your team starts each day with a written summary of what changed overnight, and a releasable increment ships every week alongside one short weekly call.

Solutions

Locations

What happens after you write to us.

01
You describe the product
One paragraph on what you are building, roughly when you need it, and who it is for. No brief, no form with fifteen fields.
02
You get a reply within a day
From the engineer who would do the work, not a sales team. If we are not the right fit we say so, and where possible we point you somewhere better.
03
You get a scoped plan
Scope, price and timeline in writing before anything is committed. You decide with the numbers in front of you.

No long contract to begin, no lock-in to our tooling, and the code is yours from the first commit.

Start a conversation

Contact

Looking for an engineering partner for the long haul?

A short note about the product, the timeline and who it is for is enough to start. You will hear back from the engineer who would do the work, not a sales team.

hello@curiosive.com See what we have shipped

Ankara / Türkiye · Working across European and US time zones