San Diego — Office of the City Treasurer — Business Tax
Find the local office for a business license or business tax certificate. Check the business activity and place covered by each service.[1]
Source checked October 16, 2026[1]www.sandiego.gov
Opens this office’s own website. CountyWiki does not process applications, take payments or provide personal records.
Contact details & office locations ↓Online services & information
These links were found on official source pages. Each service is handled by the office.
The city issues a Business Tax Certificate as acknowledgement of tax payment. Check other required zoning, police, health, state and activity approvals separately.
Service area: City of San Diego business activity; city programme, not county-wide licensing. [4]
Before you start
- Eligibility & access
- The certificate does not replace other required permits or licences. [19]
Use the current city-referred application portal. Registration is required for the online service; mail and in-person channels are also described on the city instructions page.
Service area: City of San Diego business activity; city programme, not county-wide licensing. [6]
Have the Online Account Number ready. This online payment route requires no change to the amount due; changes affecting the tax require another listed channel.
Service area: City of San Diego business activity; city programme, not county-wide licensing. [8]
Before you start
- Eligibility & access
- The online payment channel requires no change in the amount due. [21]
- Payments
- Use mail or in person when an account change increases or decreases the amount due; confirm mailing instructions first. [22]
- Processing time
- After the stated 4:30pm cutoff, payments post the following business day and penalties may accrue. [23]
The city FAQ describes online updates with Account Number and PIN, or requests to the Business Tax team. A change of owner requires a new certificate.
Service area: City of San Diego business activity; city programme, not county-wide licensing. [10]
Check employee-count categories, the additional state and minimum-wage-enforcement charges, late penalties and district assessments. These components do not calculate your final bill.
Service area: City of San Diego business activity; city programme, not county-wide licensing. [12]
Before you start
- Payments
- The late fee is the greater of $25 or 10% after the stated 15-day period; separate ongoing penalties can also apply. [26]
Check separate telephone hours, lobby walk-in days and appointments before visiting. Mailing instructions differ across the city pages; confirm the destination with the programme.
Service area: City of San Diego business activity; city programme, not county-wide licensing. [14]
Use the official appointment referral for in-person registration or the other listed programmes.
Service area: City of San Diego business activity; city programme, not county-wide licensing. [16]
Open the city exemption information and confirm whether your business qualifies; no blanket exemption or zero-dollar total is inferred here.
Service area: City of San Diego business activity; city programme, not county-wide licensing. [18]
Fees
Fees are quoted only when a source document supports the amount and conditions.
| Service | Amount | Conditions & source |
|---|---|---|
| Annual Business Tax — twelve employees or fewer | $34.00per year | Base annual tax for the stated small-business category; additional charges may apply.[33] |
| Annual Business Tax — thirteen employees or more, base | $125.00annual base | Add $5 for each employee for this category; not only employees above twelve. Additional charges may apply.[34] |
| Business Tax employee component — thirteen employees or more | $5.00per employee per year | Per-employee component in addition to the $125 category base, state charge and any other applicable charges.[35] |
| Additional state administrative charge | $4.00per application or renewal | Additional state charge; not the total city Business Tax. No effective date is inferred from legislative history.[36] |
| Annual Minimum Wage Enforcement Fee | $1.47per employee working within city per year | Additional annual employee charge for the stated city-working-employee condition; not part of a universal $38 total.[37]Effective July 1, 2025 |
| Unpaid Business Tax operating surcharge — small business | $68.00per stated surcharge | Small-business unpaid-operation surcharge, separate from the underlying tax and any late fee.[38] |
| Unpaid Business Tax operating surcharge — large business | $250.00per stated surcharge | Large-business unpaid-operation surcharge, separate from the underlying tax and any late fee.[39] |
These are individual fee items, not a quote for your total. Other charges or exemptions may apply; confirm the total with the office.
Forms & documents
Official forms and document pages for this office’s services.
- Business Tax Application — official PDF referral (opens in a new tab)PDF[40]
- Business Tax Application Instructions — official PDF referral (opens in a new tab)PDF[41]
- Solicitud De Impuestos Comerciales — official PDF referral (opens in a new tab)PDF[42]
- Instrucciones para la Solicitud De Impuestos Comerciales — official PDF referral (opens in a new tab)PDF[43]
Sources & last checked6 source pages · 43 citations
Sources were checked by an AI-assisted research process. A checked website does not mean every service or fee on it has been reviewed.
- [1] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Office of the City Treasurer
- [2] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
All businesses operating in the City of San Diego are required to register for a Business Tax Certificate.
- [3] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
All businesses operating in the City of San Diego are required to register for a Business Tax Certificate.
- [4] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
All businesses operating in the City of San Diego are required to register for a Business Tax Certificate.
- [5] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Apply for a New Business Tax Certificate Online Now
- [6] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
All businesses operating in the City of San Diego are required to register for a Business Tax Certificate.
- [7] San Diego — Business Tax renewal (opens in a new tab)
San Diego city service · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Pay Your Business Tax
- [8] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
All businesses operating in the City of San Diego are required to register for a Business Tax Certificate.
- [9] San Diego — Business Tax faq (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
How can I make a change to my existing Business Tax account?
- [10] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
All businesses operating in the City of San Diego are required to register for a Business Tax Certificate.
- [11] San Diego — Business Tax fees (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Business Tax Rates and Fees
- [12] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
All businesses operating in the City of San Diego are required to register for a Business Tax Certificate.
- [13] San Diego — Business Tax contact (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Contact the Business Tax Program
- [14] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
All businesses operating in the City of San Diego are required to register for a Business Tax Certificate.
- [15] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Schedule an appointment
- [16] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
All businesses operating in the City of San Diego are required to register for a Business Tax Certificate.
- [17] San Diego — Business Tax and rental unit tax (opens in a new tab)
San Diego city service · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Business Tax Exemptions
- [18] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
All businesses operating in the City of San Diego are required to register for a Business Tax Certificate.
- [19] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
The issuance of a Business Tax Certificate shall not relieve an owner or operator from obtaining any licenses or permits that may be necessary under other provisions of law for employees or for operation of the business.
- [20] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Businesses will be required to self-certify that the business is allowed in the zone that applies to the property where the business activity will be conducted.
- [21] San Diego — Business Tax renewal (opens in a new tab)
San Diego city service · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
There must be NO change in the amount due for the Business Tax Certificate
- [22] San Diego — Business Tax renewal (opens in a new tab)
San Diego city service · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
If changes to your Business Tax Certificate result in an increase or decrease in the amount due, you must make your payment by mail or in person.
- [23] San Diego — Business Tax renewal (opens in a new tab)
San Diego city service · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Payments processed after 4:30 p.m. (PST) will post the following business day; any penalties accrued during this time may apply.
- [24] San Diego — Business Tax faq (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
A Business Tax Certificate is not transferable in the case of a change of ownership. The new business owner must apply for a new Certificate.
- [25] San Diego — Business Tax faq (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Updates to your account can be made online. You will be requested to provide the associated Account Number and PIN
- [26] San Diego — Business Tax fees (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Businesses that fail to pay the tax within 15 days from the business start date will be assessed a late fee of $25.00 or 10% of the amount owed, whichever is greater.
- [27] San Diego — Business Tax contact (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Phone: 619-615-1500
- [28] San Diego — Business Tax contact (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Email: btax@sandiego.gov
- [29] San Diego — Business Tax contact (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Phone Hours: Monday – Friday 9:00AM – 4:00PM
- [30] San Diego — Business Tax contact (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Office Address: Office of the City Treasurer Business Tax Program 1200 Third Ave., First Floor San Diego, CA 92101
- [31] San Diego — Business Tax contact (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
The Office of the City Treasurer’s main lobby located at 1200 Third Ave. is open on Tuesdays & Thursdays from 9 a.m. to 3 p.m.
- [32] San Diego — Business Tax contact (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
If you prefer to make an appointment for Monday, Wednesday, or Friday please click the link below.
- [33] San Diego — Business Tax fees (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
$34.00 for a business with twelve (12) employees or fewer.
- [34] San Diego — Business Tax fees (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
$125.00 plus $5.00 per employee for a business with thirteen (13) employees or more.
- [35] San Diego — Business Tax fees (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
$125.00 plus $5.00 per employee for a business with thirteen (13) employees or more.
- [36] San Diego — Business Tax fees (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
As a result, the $4.00 fee remains in effect indefinitely.
- [37] San Diego — Business Tax fees (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Beginning July 1, 2025, all businesses that have employees working within the geographic boundaries of the City of San Diego will be assessed an annual Minimum Wage Enforcement Fee of $1.47 per employee.
- [38] San Diego — Business Tax fees (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
all businesses found to be operating without having paid the Business Tax will pay a surcharge of $68.00 for small business (12 employees or fewer) or $250.00 for large business (13 employees or more).
- [39] San Diego — Business Tax fees (opens in a new tab)
City of San Diego — Office of the City Treasurer · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
all businesses found to be operating without having paid the Business Tax will pay a surcharge of $68.00 for small business (12 employees or fewer) or $250.00 for large business (13 employees or more).
- [40] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Business Tax Application
- [41] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Business Tax Application Instructions
- [42] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Solicitud De Impuestos Comerciales
- [43] San Diego — Business Tax Certificate (opens in a new tab)
San Diego government · Reviewed business licensing instructions
Source reviewed October 16, 2026View supporting excerpt
Instrucciones para la Solicitud De Impuestos Comerciales