SUSTAIN LLC – Your Trusted Accounting Partner

Our Services – Tailored Accounting Solutions

At SUSTAIN LLC, we understand that no two businesses are the same. That’s why we offer a wide range of customized accounting services to support your growth, compliance, and financial decision-making. Below is a detailed overview of what we provide:

Bookkeeping & Financial Records

We manage your day-to-day financial transactions so you can focus on your business.

  • Recording income and expenses
  • Reconciling bank and credit card statements
  • Organizing receipts and invoices
  • Monthly and quarterly reports

Tax Planning & Preparation

Stay ahead of tax deadlines and reduce your liability with our strategic planning services.

  • Corporate and individual tax filing
  • Estimated tax calculations
  • IRS compliance and audit support
  • Tax-saving strategies and year-end planning

Payroll Management

Accurate, on-time payroll processing that ensures your employees are paid and your records are in order.

  • Weekly, bi-weekly, or monthly payroll
  • Direct deposits and check printing
  • Payroll tax reporting and filing
  • W-2 and 1099 preparation

Financial Reporting & Analysis

Make informed decisions with real-time financial insights.

  • Income statements, balance sheets, cash flow statements

  • Custom management reports

  • Budgeting and forecasting

  • Profitability analysis

Business Consulting

Your financial data should drive your strategy — we’ll show you how.

  • Financial health assessments
  • Business planning and budgeting
  • KPI development and tracking
  • Strategic growth advisory

Audit Preparation & Internal Controls

Minimize risk and be prepared for audits with our proactive services.

  • Internal financial reviews
  • Preparation for external audits
  • Risk assessment
  • Implementation of control systems

Our team

We are a group of experienced accountants, financial analysts, and business consultants. Each team member is dedicated to delivering clear, accurate, and timely financial information to support your success.

Alex Thompson – Business Analyst

Alex brings a data-driven approach to financial consulting. He works closely with clients to develop budgets, track KPIs, and build forecasting models that support long-term success.

Charles Clapper Founder & Chief Accountant

With over 6 years of experience in corporate and small business accounting, Sarah founded SUSTAIN LLC to offer personalized, transparent, and strategic financial support to clients. She is a Certified Public Accountant (CPA) and a QuickBooks ProAdvisor.

Monica Reyes – Payroll & Compliance Manager

Monica ensures that all payroll operations run smoothly and on time. She also manages compliance reporting and helps clients navigate complex employment regulations and labor laws.

About Us

At SUSTAIN LLC, we specialize in providing reliable and transparent accounting services for businesses of all sizes. With years of experience and a dedicated team of certified professionals, our mission is to help clients achieve financial clarity and long-term stability. 

What We Do?

We offer comprehensive accounting solutions, including bookkeeping, payroll, tax preparation, and financial consulting. Whether you're a startup or a growing enterprise, we tailor our services to meet your unique needs and ensure compliance with financial regulations.

Why Accounting Matters.
Accounting is the backbone of any successful business. It helps track income and expenses, ensures tax compliance, supports smart decision-making, and provides insights into your financial health. Without accurate accounting, even profitable businesses can face financial chaos.

What Is Accounting?
Accounting is the systematic process of recording, summarizing, and analyzing financial transactions. It involves the preparation of financial statements that reflect a business’s performance, helping stakeholders make informed decisions.

Our Track Record

We’ve helped over 200 clients streamline their financial processes and reduce tax liabilities. From small startups to established corporations, our custom solutions have led to measurable results in efficiency and savings.

Our Philosophy

The most important principle in accounting is accuracy. Every number matters. At SUSTAIN LLC, we combine precision with strategic thinking to not just record numbers, but to help you understand them and act on them wisely.

Contacts

Monday – Friday: 9:00 AM – 6:00 PM
Saturday – Sunday: Closed
Appointments available upon request.

+1 539 245 7820

1624 Linwood Blvd 73106 Oklahoma City, OK, USA