How to start a cat converter desk in Colorado legally

Last updated 2026-08-19

Do you need a license for a cat converter desk in Colorado?

Yes. A Colorado cat converter desk needs business formation, tax accounts, and purchase-record compliance under the commodity metals statute. You may also need a motor vehicle recycler license if you take in vehicles, plus a city or county secondhand or scrap license. There is no single statewide converter-desk card. Confirm recycler status in writing with the Auto Industry Division before you buy.

Colorado does not sell a product called a cat converter desk license. People still get this wrong. They hear a national podcast and assume every state copies California. Colorado does not.

What you actually hold is a stack. Articles of organization or incorporation with the Secretary of State. An EIN from the IRS if you want a bank account that is not your social security number. A sales tax account if you make taxable sales. A local business license where the desk sits. And a daily purchase book that matches C.R.S. 18-13-111 if you are buying commodity metals, which catalytic converters are, because of the platinum, palladium, and rhodium in the brick. ^[2][3]

Procure whole vehicles for parts or scrap and you cross into Title 44 motor vehicle recycler territory. That is a different board. The Auto Industry Division under the Department of Revenue runs that paper. A converter-only desk that never takes a car might stay outside recycler licensing. I would not bet the business on my reading. Mail AID a one-page fact pattern and keep the reply. ^[1]

Cities pile on. Denver, Aurora, Colorado Springs, and smaller towns write their own secondhand, pawn, or salvage rules. Unincorporated counties can be quieter or louder. Call the clerk where the roll-up door is, not where you sleep.

If you want the license path with the board names in one place, use the Colorado license breakdown next. cat converter desk license in Colorado

How much does a cat converter desk cost in Colorado?

Plan on a few hundred dollars of state formation and tax paper, then whatever your city charges, then real money for a legal bay, a scale, cameras, and insurance. The only state number I will put in ink without a phone call is the Secretary of State LLC filing. Colorado charges $50 to file articles of organization for an LLC. Confirm that figure on the current SOS fee schedule the week you file, because boards do change price lists. ^[3]

An EIN from the IRS is $0 if you apply on the IRS site. The Service says applying for an EIN is a free service. Ignore the paid expedite websites. ^[4]

Colorado sales tax licensing runs through Revenue Online. Confirm the current license fee on the Department of Revenue page before you pay anyone who offers to handle it. In recent practice the state sales tax account itself has been a registration, not a big ticket. Your city may still invoice a local business tax. ^[5]

I will not invent the Auto Industry Division recycler fee. It changes. Pull the current AID fee schedule or ask the division. Same for Denver Excise and Licenses or your county clerk. Anyone publishing a single Colorado converter license costs X figure is guessing or selling something.

The spend that actually hurts is the premises. You need a place that zoning allows for scrap or light industrial receiving. A spare bedroom is a bad plan. Neighbors call. Cops visit. Your insurance person will not like the photo.

Budget a legal commercial scale if you pay by weight. Colorado Department of Agriculture regulates commercial weighing devices. A cheap uncertified scale is how you lose a dispute and maybe a license. ^[6]

Insurance is a quote, not a blog number. General liability, property, and transit cover on a pallet of converters add up. Hire anyone and Colorado workers compensation rules kick in. ^[7]

Waste of money: a retail storefront on a pretty street. Buyers of scrap converters do not need a reception sofa. Also a waste: a furnace. You are a desk, not a smelter.

Line item	Figure you can use	Where to confirm
Colorado LLC articles	$50 on the published schedule	Secretary of State fee schedule [3]
EIN	$0	IRS online EIN [4]
State sales tax account	confirm current fee	Colorado Department of Revenue [5]
Recycler license (if it applies)	do not guess	Auto Industry Division [1]
Local scrap or secondhand license	set locally	city or county clerk
Commercial scale used in trade	device rules apply	Colorado Department of Agriculture [6]
Form 8300 cash trigger	more than $10,000	IRS Form 8300 [8]
FinCEN precious metals AML	$50,000 prior-year covered goods	31 CFR Part 1027 [9]

How long does a cat converter desk take in Colorado?

Formation can be fast. The rest is not a weekend. Colorado LLC articles filed online often post quickly, and an EIN can print the same day. Local licensing, zoning sign-off, bank underwriting, and any Auto Industry Division file are the slow pieces. Confirm current processing times with each office. Nobody has an honest statewide stopwatch for a converter desk.

I will not quote a day count for AID or a city hall. Those queues move. Call them the week you file.

The site eats weeks. Lease negotiation. Landlord consent for scrap intake. A certificate of occupancy that matches the use. Camera and fence work. A scale placed in service. A bank that will even talk to a precious-metals cash business. Some banks just say no. Start that conversation early.

Need a recycler license? Add the AID packet, identification, and whatever review they run. If you do not need one, skip it. The way you know is a written answer, not a forum post.

Do not buy converters while the license is pending unless the office told you that is legal. For this trade, pending is not licensed.

A clean first-year calendar looks like this. Week 1, entity and EIN. Week 1 to 2, tax accounts and bank. Parallel track, lease and zoning. Then local license. Then AID if required. Then you write your log, train whoever stands at the window, and open. That can be about a month in a friendly town with a ready bay. It can be a season if zoning fights you. Rural Weld or a quiet mountain county can be faster than a Denver metro site. Faster is not the same as done.

What state paper do you file first in Colorado?

File the entity first. Then tax IDs. Then site-tied licenses. That order keeps you from paying a city for a trade name that is not yours yet.

Colorado Secretary of State is the entity desk. Most people use a Colorado LLC. Articles of organization are listed at $50 on the SOS fee schedule. ^[3] Pick a registered agent who actually picks up mail. Use a name that is not already on file. File a trade name if you will buy under a DBA.

Get the EIN yourself on IRS.gov. It is free. ^[4] Open the business bank account before you take a converter. Mixing personal cash into a metals desk is how you make a mess of Form 8300 and your own taxes. ^[8]

Sales and use tax: apply through Colorado Revenue Online if you will make retail sales or if your accountant says the account is required for your fact pattern. Scrap sales to a refiner can be a different tax question than selling a used converter to a walk-in. Ask a Colorado CPA. I am not your CPA. ^[5]

Hiring employees? Register for wage withholding and unemployment. Add workers compensation. A sole owner with no staff can often skip those two. Confirm with Revenue and CDLE, not with a group chat. ^[7][12]

Hold the AID application until you know you need it. Filing a recycler application you do not need just to be safe can put you under rules written for salvage yards. That is not caution. That is extra inspectors.

Does Colorado treat converter buyers as motor vehicle recyclers?

Only if your facts match the recycler definition in Title 44. Buying a converter is not automatically the same as recycling motor vehicles. Confirm with the Auto Industry Division. ^[1]

Title 44, Article 20 is the motor vehicle dealer and recycler statute set. It lives at the Auto Industry Division. Recyclers are people in the business of procuring vehicles for parts or scrap, not every person who touches a heat shield. ^[1]

Take cars, issue dismantler paperwork, or advertise as a yard, and expect recycler licensing. Buy only already-removed converters from shops, other licensed yards, or (where legal) the public, and you may be a commodity metals purchaser and a local licensee, not a recycler. The line is fact-specific.

I have seen people file the wrong license because a vendor said everyone needs a dismantler plate. That is not a legal opinion. It is a sales pitch.

Read the definition. Then send AID your fact pattern. Keep their email. That email is worth more than a motivational thread.

Neighboring states draw the line differently. Arizona and California both run heavier vehicle-dismantler regimes than a Colorado converter-only desk may see. If you also operate there, do not copy your Colorado folder. how to start a cat converter desk in Arizona and how to start a cat converter desk in California are separate paper paths. So is the Arizona license guide.

What records does Colorado expect when you buy a converter?

Keep a real purchase book. Colorado commodity metals statute C.R.S. 18-13-111 is the core statewide record rule for this kind of buy. Log the seller, the ID, the date, and a description of what you bought. Keep it in a form you can hand a detective at 9 a.m. without digging through texts. ^[2]

Converters are commodity metals because of the platinum group metals in the brick. Treating them like a garage-sale toaster is how desks get popped.

I will not pretend I memorized every amended subsection. Pull Title 18 from the Colorado Revised Statutes and read 18-13-111 the week you open. Amendments happen. Your log should match the current statute, not a 2016 blog. ^[2]

Here is the practical minimum I would run even if a city asked for less. Government photo ID copied. Seller name and address. Phone. Vehicle plate if they drove up. Date and time. Weight or unit count. A photo of the converter and of any stamped VIN or partial VIN. How you paid. Check number or transfer ID. A signature that they own it or have the right to sell it.

A VIN plate or a stamped VIN? Write it down. Stolen converter cases turn on that number. CatConPath sells a $179 one-time VIN-Log + Theft-Compliance Kit if you want a prebuilt book. You can also print your own from the statute fields. Either way, empty rows are not a log.

Cities can demand extra fields, hold times, or electronic reporting. Ask. Then do the stricter of state or local. A pretty spreadsheet that drops columns when you email it is not a book.

Can you pay cash for catalytic converters in Colorado?

Do not assume cash is fine. Read the current text of C.R.S. 18-13-111 and any local ordinance before you open the till. Some Colorado local rules and the commodity metals framework restrict how you pay. Confirm before the first buy. ^[2]

Federal law sits on top. Receive more than $10,000 in cash in one transaction or in related transactions and you file IRS Form 8300. The IRS page is blunt. "Use Form 8300 to report cash payments over $10,000 received in a trade or business." ^[8]

That quote is about cash you receive. Paying out cash to sellers has its own state and local limits. Related transactions get people in trouble. Four $3,000 buys in a week from the same person is not clever.

I would pay by check or ACH from the business account for almost every converter. It is slower at the window. It is cleaner when a detective asks how that Honda brick left a driveway in Aurora and landed on your pallet.

A seller who will only take cash and gets angry about ID is not a customer. That is a gift you decline.

Structuring to dodge Form 8300 is its own problem. Do not do that. A bank that understands scrap tickets is worth more than a drawer of twenties.

What local licenses and zoning hit a Colorado desk?

Your city or county can require a business license, a secondhand dealer license, a scrap or salvage license, or a home-occupation ban that kills a garage plan. Zoning is often the real license. Confirm with planning and the clerk before you sign a lease.

Denver runs licenses through Excise and Licenses. Other home-rule cities write their own code. A town of 2,000 may have nothing on the books until the first complaint, then they invent a process while your converters sit.

I would not open in a residential garage. Full stop. The first neighbor video of a stranger unloading a converter at 8 p.m. becomes a council meeting.

Ask planning three questions in writing. Is scrap metal receiving allowed at this address? Are outdoor pallets allowed? What is the parking and truck-access rule? Get the use classification in the reply.

Unincorporated Adams, Arapahoe, Jefferson, Weld, or El Paso County? The county planning shop is your board. Do not use a Denver answer for a Weld address.

Fire district and health department can add occupancy limits if you store oily parts or cut substrate. A pure whole-unit desk with no torch is simpler. Simpler is the point in year one.

Do you need EPA, scale, or precious-metals AML paperwork?

Whole-converter trading for recycle is not the same as running a hazardous waste facility, but you still have federal hooks. Processed scrap metal being recycled is excluded from regulation as solid waste under 40 CFR 261.4(a)(13). The rule says, "Processed scrap metal, as described in § 261.1(c)(10), being recycled is excluded from regulation as solid waste." That helps a recycle desk. It does not let you dump ceramic dust in the alley. ^[10]

Cut, decan, or torch converters and you change the fact pattern. Dust and air rules show up. I would not cut on day one. Sell whole units to a refiner that already has the kit.

EPA also cares about tampering. Removing a working converter from a car that will go back on the road is a Clean Air Act problem. Buying already-scrap units for metal recovery is a different business. Keep your invoices looking like scrap recovery, not like you are stocking take-off converters for illegal reinstall. ^[11]

Scales used in trade belong under Colorado weights and measures. Register the device. Get it placed in service. ^[6]

Anti-money laundering: 31 CFR Part 1027 covers dealers in precious metals. The dealer definition turns on purchasing and selling at least $50,000 of covered goods in the prior calendar year. Clear that and you need an AML program. That is a written program, not a vibe. ^[9]

What do first-year operations look like on a Colorado desk?

Your first year is logging, paying clean, and saying no. Volume comes later.

Open with written buy rules at the window. No buy without ID. No buy from a minor. No buy when the story and the part do not match. No buy of a converter still dripping with exhaust hardware that looks pulled in a parking lot five minutes ago unless the seller is a shop you know and the repair order matches.

Photograph every lot. Store photos by date. Back them up off site.

Ship to a refiner on a regular cycle so you are not sitting on a pile that is both working capital and evidence. Insure the transit.

Sales tax and income tax estimated payments matter. Get a bookkeeper who has seen scrap tickets. Monthly, not April panic. ^[5]

Hire someone and you add I-9, Colorado wage withholding, and workers compensation before the first shift. ^[7][12]

Compare notes with other state guides only for ideas, not for forms. Alabama paper will not satisfy Aurora. Neither will Arkansas. how to start a cat converter desk in Alabama how to start a cat converter desk in Arkansas

What is a waste of money when you start in Colorado?

A melting furnace. A retail buildout. A giant sign. Paying a random website for an EIN. Buying converters before zoning is done. A point-of-sale toy that cannot export a detective-friendly log.

Also a waste: copying another state's hold-period form and calling it Colorado compliant. Read Colorado.

Useful spend: a commercial lease that already has industrial use. A camera system with timestamps. A bolted cabinet. A placed-in-service scale. One hour of a Colorado lawyer to ask AID and the city the recycler question. A CPA setup session.

I would run a tiny desk in year one. Payroll is how small metals shops die when rhodium dips. You do not need a lobby. You need a log that matches C.R.S. 18-13-111 and a landlord who already knows what scrap intake looks like. ^[2]

How does Colorado compare to nearby converter-desk states?

Colorado is a commodity-metals plus local-license state, with recycler licensing only if you take vehicles. California is heavier on dismantler and converter-specific buy rules. Arizona is its own pack. Do not reuse those applications. how to start a cat converter desk in California cat converter desk license in California

Colorado formation is cheap. Fifty dollars for the LLC is not the barrier. ^[3] The barrier is local permission and the discipline to log every brick.

Buy from out-of-state sellers and you still log them under Colorado rules when the buy happens here. Their home-state license does not replace your book. A New Mexico seller in your lot is still your Colorado transaction.

What should you confirm with the board before you buy a converter?

Call three desks, in this order. City or county licensing and planning for the address. Colorado Auto Industry Division for recycler status. Colorado Department of Agriculture if you will weigh. Then read C.R.S. 18-13-111 yourself. ^[1][2][6]

Ask each office for the current fee, the current form name, and the current processing time. Write the date of the call. Print their email.

CatConPath is an independent publisher, not a law firm and not a service company. If you want a prebuilt VIN log, the kit path is at /start. Your board still wins.

Do not open on a promise from a refiner sales rep. They want flow. They will not sit with you in county court.

Frequently asked questions

Do you need a license for cat converter desk in Colorado?

Yes, you need paper, but not one statewide converter-desk card. Form an entity, get tax IDs, keep a C.R.S. 18-13-111 commodity-metals log, and check city or county secondhand or scrap licensing. Ask the Auto Industry Division in writing whether your facts require a motor vehicle recycler license before you buy.

How much does cat converter desk cost in Colorado?

State formation is small. Colorado lists LLC articles of organization at $50 on the SOS fee schedule, and an IRS EIN is $0. Local licenses, a zoned bay, a legal scale, cameras, and insurance are the real spend. Confirm recycler and city fees with those boards. Do not trust a single national price.

How long does cat converter desk take in Colorado?

The LLC and EIN can happen in a day. Zoning, the lease, local licensing, banking, and any Auto Industry Division file take longer. Confirm current processing times with each office. A ready industrial bay in a friendly town can open in about a month. A zoning fight can take a season. Pending is not licensed.

Can I buy catalytic converters from the public in Colorado?

Maybe, if state commodity-metals rules and your city or county license allow it. Some desks only buy from shops and licensed yards because the theft risk and ID fights are lower. Read C.R.S. 18-13-111, then ask the local clerk. If a walk-in has no ID or a story that does not match the part, decline the lot.

Do I need a Colorado motor vehicle recycler license to run a converter-only desk?

Not automatically. Title 44 recycler licensing is built around procuring vehicles for parts or scrap. A desk that never takes a car may stay outside that statute. The Auto Industry Division decides on facts, not on forum advice. Send them your fact pattern and keep the written answer.

Is a home garage legal for a cat converter desk in Colorado?

Usually a bad idea, and often illegal. Home-occupation rules and residential zoning rarely allow scrap receiving or stranger drop-offs. Neighbors complain. Insurers balk. Rent a bay that planning already classifies for scrap or light industrial receiving, and get that classification in writing before you sign.

Do I charge Colorado sales tax on catalytic converters?

It depends on the buyer and the invoice. Sales to a refiner for metal recovery can differ from a retail sale of a used converter. Apply for a Revenue Online account if you will make taxable sales, and have a Colorado CPA map your tickets. Confirm current license fees on the Department of Revenue site.

Is there a hold period before I can ship converters I just bought?

State commodity-metals rules and local secondhand ordinances can add hold or reporting duties. There is no honest one-number statewide hold I will invent here. Ask the city or county that licenses the address, then read the current text of C.R.S. 18-13-111. Follow the stricter rule.

Can I pay cash for converters in Colorado?

Do not assume yes. Check C.R.S. 18-13-111 and the local ordinance first. Even where cash is allowed, IRS Form 8300 applies if you receive more than $10,000 in cash in one deal or related deals. I would pay by business check or ACH. A seller who refuses ID is not worth the ticket.

Do I need a commercial scale license in Colorado?

If you pay by weight in trade, yes, treat the device as a commercial weighing device under Colorado Department of Agriculture rules. Get it placed in service the right way. A kitchen scale from a retail site is not a compliance plan. Confirm device licensing on the CDA weights and measures pages.

When does FinCEN AML apply to a Colorado converter desk?

31 CFR Part 1027 treats you as a precious metals dealer if you purchased and sold at least $50,000 of covered goods in the prior calendar year. Cross that line and you need a written AML program. Track your annual ticket total. Do not wait for a letter.

What if a converter has no VIN when it hits the window?

Buy only if the rest of the file is clean: government ID, a lawful seller story, photos, and a description that would stand up in the log. Many aftermarket or cut units have no VIN. That is not permission to skip the book. If the part looks freshly stolen, pass. Your refiner will not bail you out.

Sources

1. Colorado OLLS, Colorado Revised Statutes 2023 Title 44: Title 44, Article 20 is the Colorado motor vehicle dealer and recycler statute set administered through the Auto Industry Division.
2. Colorado OLLS, Colorado Revised Statutes 2023 Title 18: C.R.S. 18-13-111 sets statewide purchase-record rules for commodity metals, which include the platinum group metals in catalytic converters.
3. IRS, Apply for an Employer Identification Number (EIN) Online: Applying for an EIN is a free service offered by the Internal Revenue Service.
4. Colorado Department of Revenue, How to apply for a sales tax license: Colorado businesses that need a sales tax license apply through the Department of Revenue (Revenue Online).
5. Colorado Department of Agriculture, Weights and Measures: Colorado regulates commercial weighing and measuring devices used in trade through the Department of Agriculture.
6. Colorado Department of Labor and Employment, Workers' compensation for employers: Colorado employers generally must carry workers compensation coverage when they have employees.
7. IRS, About Form 8300: Use Form 8300 to report cash payments over $10,000 received in a trade or business.
8. eCFR, 31 CFR Part 1027 Rules for Dealers in Precious Metals, Precious Stones, or Jewels: A precious metals dealer definition and AML program duty turn on purchasing and selling at least $50,000 of covered goods in the prior calendar year.
9. eCFR, 40 CFR 261.4 Exclusions: Processed scrap metal being recycled is excluded from regulation as solid waste under 40 CFR 261.4(a)(13).
10. U.S. EPA, Tampering Policy (Nov. 23, 2020): EPA enforces Clean Air Act anti-tampering rules on removing or replacing emission controls, which is a different fact pattern than scrap metal recovery.
11. Colorado Department of Revenue, Wage withholding: Colorado employers must register for wage withholding when they have employees.