Industry Guide
EIN for SaaS Founders Guide
SaaS companies need an EIN for tax filing, US bank accounts, and Stripe payment processing. Non-residents apply with a passport number — no SSN required. $49 Standard. $97 Express.
SaaS founders need a US EIN to file business taxes, open a US bank account, and activate Stripe. Non-residents apply by faxing IRS Form SS-4 with a passport number on Line 7b — no SSN or ITIN required. The IRS charges $0 for the EIN. The online tool requires an SSN, so non-residents use the fax route to 855-215-1627. ein.so prepares and files the SS-4 for $49 Standard (4-7 business days) or $97 Express (2-3 business days).
Software-as-a-service companies sell subscriptions, charge recurring revenue, and collect payments through processors like Stripe. Every one of these activities runs through a US business entity, and that entity needs a federal tax ID. The EIN is that ID. It is a 9-digit number formatted XX-XXXXXXX. This guide explains when a SaaS founder needs an EIN, how US and non-US founders apply, how the EIN connects to Stripe and banking, and what a foreign-owned SaaS LLC files each year.
| Factor | US SaaS Founder | Non-US SaaS Founder |
|---|---|---|
| EIN required for LLC/corp | Yes | Yes |
| SSN required | Has one | No (uses passport) |
| Application method | IRS online tool | Fax Form SS-4 |
| EIN cost (IRS) | $0 | $0 |
| ein.so filing fee | $49 / $97 | $49 / $97 |
| Annual IRS filing | Varies by entity | Form 5472 + 1120 |
Do You Need
Do SaaS Founders Need an EIN?
SaaS founders need an EIN when they run a US LLC or corporation, hire employees, or connect a payment processor. A sole proprietor with no employees can use an SSN, but an EIN keeps that SSN off contracts and W-9 forms. The EIN is free from the IRS.
A SaaS business touches money fast. The moment you sign up for Stripe, sign a vendor contract, or open a bank account, a tax ID is required. Using your EIN instead of your SSN protects your personal identity on every form a customer, processor, or vendor sees.
| Situation | EIN Needed? |
|---|---|
| SaaS LLC | Yes (required) |
| SaaS corporation | Yes (required) |
| SaaS with employees | Yes (required) |
| Non-US founder with US LLC | Yes (required) |
| Solo founder, no entity, no employees | Recommended |
| Pre-launch, no entity formed | Not yet |
Why SaaS Founders Get an EIN
- Stripe activation — Stripe requires a tax ID to onboard a US business
- Business banking — open a US business bank account with US routing numbers
- SSN privacy — keep your personal number off vendor and customer forms
- Tax filing — report business income under the entity, not your name
- Hiring — required before you run payroll for your first engineer
Use Cases
Why Do SaaS Founders Need a US EIN Specifically?
SaaS founders need a US EIN because the US is where payment processors, customers, and venture capital concentrate. A US entity with an EIN unlocks Stripe, US banking, and investor-ready structure. Non-US founders form a US LLC or corporation to reach this market remotely.
Stripe and Recurring Billing
US Bank Account in USD
Investor-Ready Structure
Vendor and SaaS Tooling Contracts
Step-by-Step
How Does a SaaS Founder Apply for a US EIN?
A non-US SaaS founder applies for a US EIN by faxing Form SS-4 to the IRS at 855-215-1627, using a passport number on Line 7b in place of an SSN. The IRS online tool requires an SSN. The IRS issues most correctly filed EINs within 4-7 business days.
Form Your US Entity
Gather Your Documents
Complete Form SS-4
Submit by Fax and Receive Your EIN
SaaS Founder SS-4 Field Guide
| SS-4 Field | SaaS Founder Entry |
|---|---|
| Line 1 (Legal name) | Your US LLC or corporation name |
| Line 4 (Mailing address) | Your home or registered agent address |
| Line 7a (Responsible party) | Your full name as shown on your passport |
| Line 7b (SSN/ITIN/EIN) | Your passport number (non-residents) |
| Line 9a (Entity type) | LLC or Corporation |
| Line 10 (Reason) | Started new business |
| Line 16 (Principal activity) | "Software" or "SaaS" |
The most common rejection cause for non-residents is address formatting. The IRS silently rejects malformed international addresses. ein.so reformats your address to an IRS-accepted style. See the full SS-4 form guide and the complete EIN application process. For the no-SSN path, read EIN without SSN.
Application Methods
How Should a SaaS Founder Get an EIN Fastest?
A US founder with an SSN gets an EIN fastest through the IRS online tool, which issues the number in the same session. A non-US founder gets it fastest through ein.so Express in 2-3 business days for $97, versus 4-7 business days for the DIY fax route.
| Method | Speed | Cost | SSN Needed |
|---|---|---|---|
| IRS online tool | Same session | $0 | Yes |
| DIY fax (Form SS-4) | 4-7 business days | $0 | No |
| ein.so Standard | 4-7 business days | $49 | No |
| ein.so Express | 2-3 business days | $97 | No |
The DIY fax route is free, but a single SS-4 error restarts the timeline. International calls to the IRS during US business hours add cost and friction. ein.so checks the form, faxes it, and emails the EIN. Compare full pricing on the EIN cost page and timelines on the EIN processing time page.
Banking & Payments
How Does a SaaS Founder Use an EIN for Stripe and Banking?
A SaaS founder uses the EIN as the tax ID that activates Stripe and opens a US business bank account. Stripe routes subscription payouts to that account. Mercury and Relay approve many non-resident LLC owners remotely within a few business days of EIN issuance.
Stripe on a US Entity
US Business Bank Account
USD Settlement and Payouts
Vendor Payments and Tooling
Connect Stripe and your bank only after the IRS issues your EIN assignment letter. The letter is the proof both Stripe and your bank request during verification.
Tax Considerations
What Taxes Does a Foreign-Owned SaaS LLC Owe?
A foreign-owned single-member US LLC files Form 5472 plus a pro-forma Form 1120 with the IRS each year. The penalty for not filing Form 5472 is $25,000. The LLC is usually a disregarded entity for US federal income tax, but tax treatment of SaaS revenue varies by structure.
Form 5472 + Pro-Forma 1120
C-Corporation Tax
Sales Tax on SaaS
BOI Report to FinCEN
ein.so files your EIN, not your taxes
- ein.so prepares and files Form SS-4 to obtain your EIN. ein.so does not provide tax advice.
- SaaS revenue, sales tax nexus, and entity tax treatment are complex and state-specific.
- Work with a US CPA familiar with non-resident and SaaS matters before you file returns.
Requirements
What Does a SaaS Founder Need to Get an EIN?
A non-US SaaS founder needs three things to get an EIN: a US entity, a passport, and a mailing address. No SSN, ITIN, or US address for the responsible party is required. A US founder needs the same plus an SSN for the faster online route.
Checklist before you apply
- A formed US LLC or corporation with a name and formation state
- A valid, unexpired passport (non-residents use this on Line 7b)
- A mailing address for Line 4 (home or registered agent address)
- Your principal business activity ("software" or "SaaS") for Line 16
- Your full legal name as it appears on your passport for Line 7a
You do not need revenue, customers, or a US bank account before applying for the EIN. In fact, the EIN comes first: you need it to open the bank account and activate Stripe. Apply as soon as the entity exists so your payment rails are ready before your first subscriber. See who needs an EIN for full eligibility and EIN for non-residents for the non-US path.
Next Steps
After Getting Your EIN as a SaaS Founder
- Open a US bank account — Mercury, Relay, and Wise accept non-resident LLC owners
- Activate Stripe — supply your EIN as the business tax ID during onboarding
- File your BOI report — required for most LLCs, free at fincen.gov/boi
- File Form 5472 — annually for foreign-owned LLCs ($25,000 penalty for non-filing)
- Plan taxes with a CPA — confirm SaaS sales tax nexus and entity treatment
Related guides: EIN without SSN | EIN for non-residents | How to get an EIN | SS-4 form guide | EIN cost | EIN processing time. Browse all industries and what you can do with an EIN.
Frequently Asked Questions
Do SaaS founders need an EIN?
SaaS founders need an EIN if they operate a US LLC or corporation, hire employees, or connect a US payment processor. An EIN is the 9-digit federal tax ID the IRS issues to businesses. It separates your business and personal tax identities and keeps your SSN off vendor forms. The IRS charges $0; ein.so files Form SS-4 for $49.
Can non-US SaaS founders get an EIN without an SSN?
Yes. Non-US SaaS founders get an EIN with no SSN and no ITIN. You enter your passport number on Form SS-4 Line 7b and fax the form to the IRS at 855-215-1627. The IRS online tool requires an SSN, so non-residents use the fax route. ein.so prepares and faxes the SS-4 for $49 Standard or $97 Express.
How long does it take a SaaS founder to get an EIN?
Through ein.so, Standard processing takes 4-7 business days for $49 and Express takes 2-3 business days for $97. The DIY fax method takes 4-7 business days when the SS-4 contains no errors. US founders with an SSN can use the IRS online tool and receive an EIN the same session. Banking and Stripe setup follow EIN approval.
Do I need an EIN to use Stripe for my SaaS?
Stripe requires a tax ID to activate a US business account. A US LLC or corporation uses its EIN as that tax ID during Stripe onboarding. The EIN links your SaaS revenue to your business entity, not your personal identity. Connect Stripe after the IRS issues your EIN assignment letter. See the EIN for bank account guide for the documents you need.
Should a SaaS founder form an LLC or a corporation?
Solo and bootstrapped SaaS founders often choose an LLC for simplicity and pass-through treatment. Founders raising venture capital usually choose a Delaware C-corporation because investors prefer that structure. Both entities need an EIN before banking or payment setup. Confirm the right structure for your situation with a CPA. ein.so files the EIN for either entity type.
How much does an EIN cost for a SaaS company?
The IRS charges $0 for an EIN regardless of industry. ein.so charges $49 for Standard filing (4-7 business days) and $97 for Express filing (2-3 business days). The fee covers SS-4 preparation, IRS fax submission, error checking, and email delivery of your EIN. There is no per-seat or recurring cost for the EIN itself.
What does a foreign-owned SaaS LLC file with the IRS each year?
A foreign-owned single-member US LLC files Form 5472 plus a pro-forma Form 1120 with the IRS every year. The penalty for not filing Form 5472 is $25,000. This is an information return that reports transactions between the LLC and its foreign owner. SaaS revenue and tax treatment vary by structure, so confirm your filings with a US CPA.
Can I get an EIN before my SaaS earns revenue?
Yes. SaaS founders apply for an EIN as soon as the US LLC or corporation exists, before the first sale. The EIN is required to open a bank account, activate Stripe, and sign vendor contracts. Applying early means your banking and payment rails are ready when your first customer subscribes. ein.so delivers the EIN by email in 4-7 business days.
Do SaaS founders need a US address to get an EIN?
No. SaaS founders enter a non-US address on Form SS-4 Line 4 when they have no US address. The IRS accepts foreign addresses for the responsible party. Most non-resident founders use their registered agent or formation address for the LLC itself. ein.so reformats international addresses to an IRS-accepted style to prevent silent rejection.
Need an EIN? We Handle Everything.
Non-US resident? We file Form SS-4 with the IRS and deliver your EIN by email. Just $49.
Get My EIN for $49