How are SIC Codes and NAICS Codes assigned to small businesses?
I'm about to launch my small business in the next couple months and I've been doing quite a bit of research about all the things I need to get going. One thing that keeps coming up is SIC codes and NAICS codes. From what I understand, having the right SIC code can potentially help with getting funding from banks? But I'm confused about how these codes actually get assigned. Do I pick them myself? Does the government assign them? Is there an application process? I want to make sure I get this right from the beginning since apparently it could affect my ability to get loans. Any insights from people who've gone through this process would be super helpful!
18 comments


Daniel Price
Small business tax advisor here! Good news - you don't need to worry about someone "assigning" these codes to you. You actually select them yourself based on what your business does. SIC (Standard Industrial Classification) codes are the older system, while NAICS (North American Industry Classification System) codes are the newer, more detailed classification system that replaced SIC. Most government agencies now use NAICS, but some banks and insurance companies still reference SIC codes. You'll want to identify the codes that most accurately describe your primary business activity. For the NAICS, start broad (2-digit sector) and get increasingly specific (up to 6 digits). You can look up the appropriate codes on the Census Bureau website or the NAICS Association website. There's a crosswalk tool that can help you convert between SIC and NAICS codes too. You're right that these classifications can impact funding - some banks and lenders do use these codes to determine lending risk and eligibility for certain programs. They're also used for tax purposes and industry statistics.
0 coins
Caleb Stone
•Thank you so much for this clear explanation! So if I understand correctly, I just need to find the codes that best match what my business does? I'm planning to open a specialty bakery focusing on gluten-free products. Would I just look up bakery-related codes and pick the most appropriate one? And do I need to register these codes somewhere official, or do I just start using them on my paperwork?
0 coins
Daniel Price
•Yes, you've got it right! For a specialty bakery focusing on gluten-free products, you'd look for something in the food manufacturing or retail bakery category. For NAICS, you might start with code 311 (Food Manufacturing) and then drill down to something like 311812 (Commercial Bakeries) or 311811 (Retail Bakeries) depending on your business model. You don't need to officially register these codes with any central authority. You'll simply use them when filling out various forms like tax documents, loan applications, or business registrations. Different agencies might ask for this information on their specific forms. Just be consistent with how you classify your business across different applications and filings.
0 coins
Olivia Evans
When I was setting up my ecommerce business last year, I was confused about all these codes too! Then I found https://taxr.ai which completely simplified the process. I uploaded my business plan and it automatically suggested the most appropriate NAICS and SIC codes for my business. It even showed me how certain code selections might impact funding opportunities and potential tax benefits. The system also highlighted industry-specific deductions I wasn't aware of based on my classification. Saved me hours of research!
0 coins
Sophia Bennett
•Does it work for complex businesses with multiple revenue streams? My company does web design, but we also sell digital products and offer consulting services. I've been using different codes on different forms which I'm worried might cause problems.
0 coins
Aiden Chen
•I'm skeptical about automated systems for this. Wouldn't a real accountant or business advisor be better at picking the optimal code? Sometimes these classifications are nuanced and you want to position yourself for the best lending rates.
0 coins
Olivia Evans
•For businesses with multiple revenue streams, the tool actually helps identify which should be your primary classification based on your largest revenue source. It also lets you note secondary activities. This helps maintain consistency across all your paperwork which is important for avoiding red flags. The system is actually pretty sophisticated and was developed with input from tax professionals. While a personal accountant is always valuable, this tool applies consistent rules based on actual classification guidelines. It's designed to help you find the most accurate codes, not just the ones that might seem preferential for lending - because misclassification can cause bigger problems down the road.
0 coins
Aiden Chen
Just wanted to update after trying out taxr.ai that was mentioned above. I was initially skeptical but decided to give it a shot with my construction business that has several different service lines. The tool actually provided much more detailed guidance than I expected! It walked me through the classification hierarchy and explained why certain codes were more appropriate than others for my specific situation. It also flagged that one of the codes I was considering using might trigger higher insurance rates in my industry, which was something I hadn't considered. Really helpful for making an informed decision rather than just guessing.
0 coins
Zoey Bianchi
If you're still confused after trying to figure out your codes, don't feel bad. I spent days researching this for my consulting business and still got contradictory advice. What finally worked was calling the IRS directly using https://claimyr.com to skip their ridiculous phone wait times. Got connected to an agent in about 10 minutes who confirmed the right NAICS code for my situation and explained exactly how to use it on my Schedule C. Their video explainer at https://youtu.be/_kiP6q8DX5c shows how the service works. Totally changed my perspective on dealing with the IRS - turns out they can actually be helpful when you can reach a human!
0 coins
Christopher Morgan
•Wait, there's actually a way to talk to real IRS people without waiting for 3 hours? How exactly does this work? Do they just call the regular IRS number for you or what?
0 coins
Aurora St.Pierre
•This seems too good to be true. I've literally spent entire days on hold with the IRS before giving up. Why would they answer a call from this service when they ignore everyone else? Sounds like a scam to me.
0 coins
Zoey Bianchi
•They actually use a system that navigates the IRS phone system and holds your place in line, then calls you when an agent picks up. It's completely legitimate - they don't call a special number or anything like that. They're just using technology to deal with the frustrating hold system so you don't have to stay on the phone yourself. It's not that the IRS is answering their calls preferentially - they're just solving the hold time problem. I was done with my entire call in less than 30 minutes including the time spent talking to the agent. Don't take my word for it though, check out their reviews online. Total game changer for tax season.
0 coins
Aurora St.Pierre
Alright, I need to publicly eat my words. After posting my skeptical comment above, I decided to try https://claimyr.com myself since I've been struggling with a NAICS code issue for my home-based business. I was absolutely SHOCKED when I got a call back connecting me to an actual IRS agent after just 14 minutes! The agent walked me through exactly which code would be most appropriate for my situation (I was using an outdated one) and explained how it might affect my audit risk. She also answered a couple other tax questions I had. The whole experience was honestly surreal after spending so many hours on hold in the past. Consider me converted.
0 coins
Grace Johnson
One thing nobody's mentioned yet - your SIC/NAICS code can affect your insurance rates too! My business insurance premiums were way higher than quotes I saw online because the insurance company had classified my e-learning business under a higher-risk category. Once I pointed out the correct NAICS code, my premiums dropped by almost 30%. So definitely take the time to get this right.
0 coins
Caleb Stone
•Wow, I had no idea insurance rates could be affected too. Do you know if it's possible to change your code later if you realize you picked the wrong one? Or are you kind of stuck with whatever you initially choose?
0 coins
Grace Johnson
•You can absolutely change your classification codes later if needed. Businesses evolve over time, and sometimes your primary activities shift. Just be aware that if you're changing them on existing accounts (like with your insurance company or bank), they might ask questions about why you're changing classification. The important thing is to be accurate and consistent. If you realize you've been using the wrong code, it's better to correct it than to continue with an inaccurate classification. Just make sure you update it everywhere - tax filings, loans, insurance, etc. - to avoid discrepancies that might raise red flags.
0 coins
Jayden Reed
Here's my 2 cents as someone who's owned multiple small businesses - don't overthink this too much. Pick the code that most accurately represents what your business actually does. The NAICS website has a search function where you can type in keywords related to your business and find matching codes. Just be honest!
0 coins
Nora Brooks
•But doesn't picking certain codes make you more likely to get audited? I heard restaurants and cash-based businesses get flagged more often.
0 coins