Nonprofit Accounting Services in Chicago, Illinois

Get nonprofit accounting support built for stronger reporting, cleaner processes, and confident leadership decisions. One Abacus Advisory helps Chicago organizations improve financial clarity, grant compliance, and board-ready reporting with flexible, senior-level guidance. Whether you're managing restricted funds, preparing for an audit, or strengthening internal controls, our services are tailored to mission-driven teams across Chicago, Illinois.

Nonprofit accounting team reviewing financial reports

Our Nonprofit Accounting Services

Flexible accounting, reporting, and financial leadership services tailored to nonprofit organizations and 501(c)(3) teams.

Back Office Accounting

Day-to-day nonprofit accounting support that improves accuracy, reporting, budgeting, cash flow monitoring, and internal systems for smoother financial operations.

Fractional CFO

Executive-level financial oversight for budgeting, forecasting, compliance, board reporting, and strategic planning without the cost of a full-time CFO.

Fractional Controller

Controller-level support focused on financial statements, accounting policies, team oversight, compliance, and stronger internal financial management.

Accounting Assessments

Comprehensive reviews of people, processes, and systems to identify reporting gaps, control issues, automation opportunities, and compliance risks.

Nonprofit Payroll

Payroll and finance support for 501(c)(3) organizations, including implementation, reporting alignment, and workflow improvements for better accuracy.

NetSuite Optimization

Support for NetSuite and related accounting platforms through workflow improvements, reporting enhancements, training, and system optimization.

Nonprofit Finance Experts

Financial Clarity for Mission-Driven Growth

Nonprofit accounting is more than bookkeeping—it supports compliance, board confidence, and better decisions. One Abacus Advisory helps Chicago, Illinois organizations strengthen reporting, budgeting, cash flow visibility, and internal controls with right-sized support. From grant-funded programs to audit preparation and system improvements, our services are designed to reduce administrative strain while giving leadership clearer financial insight.

Consultant reviewing nonprofit financial statements
Trusted Nonprofit Partner

Success Stories

See how mission-driven organizations benefit from clearer reporting, stronger controls, and flexible financial leadership.

"We appreciate many things about One Abacus, but the thing that stands out most is their team's investment in our success. They have gone above and beyond to deeply understand our organization and our financial structure. One Abacus' outside viewpoint and collaboration have allowed us to create and implement a..."

Ingrid M. Nyholm-Lange

"We chose One Abacus Advisory to provide support to our accounting team while we recruited after our Finance Director departed our organization. Lorin met with me to efficiently assess how best to help our organization. Marjorie, from One Abacus Advisory, was able to step in as our interim Director seamlessly..."

Allyson Tutor

"One Abacus has been an incredible partner during a critical time for our team. They quickly mobilized a talented group of professionals who handled everything from day-to-day accounting to audit prep with expertise and ease. They took the time to understand our unique needs and were always responsive—even for last-minute..."

Brenda Simmons

"One Abacus has been an exceptional partner to our organization during a crisis period. They quickly organized and brought together an extraordinary team that seamlessly supported everything from day-to-day accounting operations to complex audit preparation. Their expertise, efficiency, and calm command of the work immediately gave our staff and board..."

Adele Adkins

"We appreciate many things about One Abacus, but the thing that stands out most is their team's investment in our success. They have gone above and beyond to deeply understand our organization and our financial structure. One Abacus' outside viewpoint and collaboration have allowed us to create and implement a..."

Ingrid M. Nyholm-Lange

"We chose One Abacus Advisory to provide support to our accounting team while we recruited after our Finance Director departed our organization. Lorin met with me to efficiently assess how best to help our organization. Marjorie, from One Abacus Advisory, was able to step in as our interim Director seamlessly..."

Allyson Tutor

"One Abacus has been an incredible partner during a critical time for our team. They quickly mobilized a talented group of professionals who handled everything from day-to-day accounting to audit prep with expertise and ease. They took the time to understand our unique needs and were always responsive—even for last-minute..."

Brenda Simmons

"One Abacus has been an exceptional partner to our organization during a crisis period. They quickly organized and brought together an extraordinary team that seamlessly supported everything from day-to-day accounting operations to complex audit preparation. Their expertise, efficiency, and calm command of the work immediately gave our staff and board..."

Adele Adkins

"We appreciate many things about One Abacus, but the thing that stands out most is their team's investment in our success. They have gone above and beyond to deeply understand our organization and our financial structure. One Abacus' outside viewpoint and collaboration have allowed us to create and implement a..."

Ingrid M. Nyholm-Lange

"We chose One Abacus Advisory to provide support to our accounting team while we recruited after our Finance Director departed our organization. Lorin met with me to efficiently assess how best to help our organization. Marjorie, from One Abacus Advisory, was able to step in as our interim Director seamlessly..."

Allyson Tutor

"One Abacus has been an incredible partner during a critical time for our team. They quickly mobilized a talented group of professionals who handled everything from day-to-day accounting to audit prep with expertise and ease. They took the time to understand our unique needs and were always responsive—even for last-minute..."

Brenda Simmons

"One Abacus has been an exceptional partner to our organization during a crisis period. They quickly organized and brought together an extraordinary team that seamlessly supported everything from day-to-day accounting operations to complex audit preparation. Their expertise, efficiency, and calm command of the work immediately gave our staff and board..."

Adele Adkins
The One Abacus Difference

Why Choose One Abacus Advisory?

Organizations rely on us for practical nonprofit financial leadership and dependable operational support.

Nonprofit Focus

Deep nonprofit expertise supports Chicago organizations with reporting, compliance, and mission-aligned financial leadership.

Senior Guidance

Access CFO- and controller-level insight without the cost and commitment of full-time executive hires.

Board Visibility

Board-ready reporting helps leaders present performance, risks, and priorities with greater clarity and confidence.

Flexible Support

Right-sized services adapt to Chicago nonprofits navigating growth, audits, grants, and operational transitions.

Meet The Chicago Team

Experienced advisors supporting nonprofit financial leadership.

Portrait of Lorin Port, Founder and Consulting CFO of One Abacus Advisory

Lorin Port

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 aligned with their unique mission and operational needs.

Frequently Asked Questions

What do nonprofit accounting services include?

Nonprofit accounting services typically include day-to-day bookkeeping support, financial statement preparation, budgeting, forecasting, cash flow monitoring, payroll coordination, grant tracking, board reporting, and internal control improvements. For many organizations, it also includes higher-level guidance such as fractional CFO or controller support to strengthen compliance, improve reporting accuracy, and help leadership make informed financial decisions.

How is nonprofit accounting different from for-profit accounting?

Can you help our nonprofit prepare for an audit?

Do you provide fractional CFO or controller support for nonprofits?

Can nonprofit accounting services help with grant compliance?

Do you support payroll for 501(c)(3) organizations?

Can you work with our current accounting software or ERP?

Is outsourced nonprofit accounting a good fit for growing organizations?

Still Have Questions About Your Finances?

Talk with our team about your nonprofit’s accounting needs.

Trusted Expertise

Awards and Recognition

25+ Years Experience recognition badge

25+ Years Experience

Extensive finance and accounting leadership.

Nonprofit Specialist recognition badge

Nonprofit Specialist

Focused expertise for mission-driven organizations.

Fractional Executive Support recognition badge

Fractional Executive Support

Senior guidance without full-time overhead.

Talk With a Nonprofit Accounting Advisor

Share your organization’s goals, reporting challenges, or system needs, and we’ll help you explore the right level of support.

Contact Us Today

For immediate assistance, feel free to give us a direct call at 760-845-3808. You can also send us a quick email at lorin@oneabacusadvisory.com.