James Castaldo C.P.A. & Associates | 631-302-1945

google plus linked in twitter facebook

Welcome to James Castaldo C.P.A. & Associates

Our Long Island accounting firm believes that clients' success determines our own. So we ensure both by collaborating with our clients to achieve their goals

accounting customer service


At James Castaldo C.P.A. & Associates, we pride ourselves on our excellent tax and accounting services for small local businesses.



Do you or your business need guidance with tax planning, or an experienced tax professional to complete your returns?

accounting services


Our Long Island, NY accounting services range from simple bookkeeping to complex accounting strategies and tax planning.

Accounting strategies


To lower your overall tax burden, we take proactive steps that are legally accepted.

Long Island CPA Accounting Services

James Castaldo C.P.A. & Associates is a Long Island CPA firm located in Lake Grove, offering comprehensive accounting and tax services for small businesses and individuals. We provide tax preparation, outsourced accounting and bookkeeping, retirement and estate planning, new business advisement and more.

In addition to our wide range of accounting and bookkeeping services, we also work with new businesses select the best entity and develop a sound business plan so they start off on the right foot. We can devise tax planning strategies that retain more of your profits and provide tax preparation services for both businesses and individuals.

For all of our clients, our goal is to form a long-standing professional relationship. We’ll take the time to listen carefully to your concerns then forge a plan to meet all your accounting, bookkeeping and tax needs. Please call us today at 631-302-1945 and accept our invitation for a free initial consultation. We look forward to hearing from you.

Our Services

accounting service

Business Accounting

If your small business needs its bookkeeping and accounting needs to be taken care of, our experienced CPA can lend you a hand.

Learn More
tax services

Tax Services

From income tax preparation for individuals to tax planning services for small businesses in Long Island, we're provide the tax services you need.

Learn More


Setting up QuickBooks for the first time? Need to learn how to use QuickBooks to help your business? Or do you need us to review your data files? 

Learn More
new business

New Business Advisor

If you're starting a new business, it's important to choose the right entity that will work for you. Our experienced accountants will know what's best for your situation.

Learn More

enhancer our offices

Lake Grove Office

6 Forest Avenue

Lake Grove, NY 11755

Telephone: 631-302-1945

Get Directions on the map

Melville Office

68 South Service Rd

Melville, NY 11747

Telephone: 631-440-5447

Get Directions on the map