Accounting Services
Reliable day-to-day accounting support that keeps nonprofit records accurate, timely, and organized while improving processes, internal controls, and financial visibility for leadership and boards.
Get nonprofit-focused accounting and bookkeeping support designed to improve reporting accuracy, strengthen controls, and give leadership clearer financial visibility. Whether your organization is managing grants, board reporting, or cash flow in Tucson's evolving nonprofit landscape, One Abacus Advisory delivers practical guidance that supports compliance, stability, and mission-driven decision-making.

Comprehensive nonprofit accounting support tailored to reporting, compliance, systems, and financial leadership needs.
Reliable day-to-day accounting support that keeps nonprofit records accurate, timely, and organized while improving processes, internal controls, and financial visibility for leadership and boards.
Hands-on oversight of budgeting, forecasting, cash flow monitoring, and financial statement preparation to help nonprofits maintain compliant, dependable financial operations and stronger decision-making.
A detailed review of accounting people, processes, and systems to identify risks, inefficiencies, and control gaps, followed by practical recommendations for improvement.
Improves accounting platforms and workflows through better configuration, automation, reporting, and training so nonprofit teams can work more efficiently and accurately.
Experienced controller and finance director support that bridges daily accounting execution with stronger reporting integrity, compliance, and team management.
Executive-level financial leadership for nonprofits that need strategic oversight, board-ready reporting, audit preparation, and mission-aligned planning without a full-time hire.
One Abacus Advisory helps nonprofits build stronger accounting foundations through accurate bookkeeping, clearer reporting, and better financial systems. From monthly close support to board-ready statements and internal control improvements, services are tailored to each organization's needs. For Tucson nonprofits balancing grant requirements, donor accountability, and sustainable growth, this support brings structure, confidence, and practical financial leadership.

See how nonprofit leaders gain stronger reporting, stability, and confidence through tailored financial support.
Nonprofits rely on experienced, flexible financial support that strengthens operations without unnecessary overhead.
Specialized support built around nonprofit reporting, grants, governance, and mission-driven financial decision-making.
Get right-sized accounting and finance expertise in Tucson without the cost of full-time executive staffing.
Clear, actionable reporting helps executives and boards make confident decisions and maintain stakeholder trust.
Improved controls, workflows, and accounting systems support reliable operations for growing Tucson-area nonprofit organizations.
Experienced nonprofit finance leadership you can trust.

Founder, Consulting CFO
Lorin Port is the Founder and Consulting CFO of One Abacus Advisory, bringing over 25 years of finance and accounting experience to the nonprofit sector. With a dedicated focus on nonprofit financial leadership for the past nine years, Lorin specializes in fractional CFO and COO services, nonprofit accounting, and NetSuite optimization. He has partnered with prominent organizations such as the San Diego Food Bank, Philadelphia Zoo, and Laguna Playhouse, delivering strategic financial guidance during periods of growth, transition, and complexity. Lorin is committed to empowering nonprofit leaders and boards with clear, actionable insights that drive stronger decisions and long-term organizational health. His flexible, right-sized approach ensures each client receives tailored support that aligns with their unique mission and operational needs.
Nonprofit accounting and bookkeeping services typically include transaction recording, account reconciliations, monthly close support, financial statement preparation, budget tracking, cash flow monitoring, and board-ready reporting. For nonprofits, the work also often includes fund tracking, grant compliance support, internal control improvements, and systems optimization so leadership has accurate, timely information for oversight and decision-making.
Talk with a nonprofit finance expert about your organization's needs.
Seasoned finance and accounting leadership.
Focused expertise for nonprofit organizations.
Executive guidance without full-time overhead.
Share your organization's accounting needs, reporting challenges, or system concerns, and we'll follow up with the right next steps.
For immediate assistance, feel free to give us a direct call at +1 760-845-3808. You can also send us a quick email at lorin@oneabacusadvisory.com.
For immediate assistance, feel free to give us a direct call at +1 760-845-3808. You can also send us a quick email at lorin@oneabacusadvisory.com.