Business Details
23 Years
experience
Expert Accounting & Bookkeeping Services in Oshawa, ON
At Kiessling & Associates, we combine over three decades of industry expertise with a client-centric approach to deliver tailored accounting and bookkeeping solutions. Our team of certified professionals, including Certified Professional Bookkeepers and QuickBooks Pro Advisors, prioritizes ongoing education to stay ahead of regulatory changes and technological advancements. We specialize in bookkeeping compliance, tax preparation, and virtual CFO services, empowering businesses and individuals to focus on growth while we ensure financial accuracy and compliance. Our commitment to personalized service and community engagement has earned us recognition as an industry leader in Oshawa, Ontario. 
Services
Bookkeeping Compliance
Corporate Tax Returns
Income Tax Preparation
Virtual CFO Services
Not-For-Profit Accounting
Details
- Year established: 2003
Highlights and features
- We offer over 30 years of accounting and bookkeeping expertise.
- Our team includes certified professionals with advanced QuickBooks training.
- We provide customized service packages to fit every budget.
- We prioritize ongoing education to stay current with regulations.
- We leverage the latest technology for efficient, accurate results.
Associations and certifications
- 2024 Oshawa-Whitby Reader's Choice Awards
- Certified Professional Bookkeeper (CPB)
- QuickBooks Pro Advisor
What people say
Industry leader
Expertise
Personalized service
Reliable tax solutions
Certified professionals
Services
Bookkeeping Compliance
Our bookkeeping services ensure accurate financial records, including accounts receivable/payable, payroll processing, and tax compliance. We help businesses maintain organized records for improved decision-making. Our team uses advanced tools to streamline processes and ensure regulatory compliance.
Corporate Tax Returns
We prepare corporate T2 tax returns and financial statements, offering year-end reviews with actionable insights. Our experts identify tax-saving opportunities while ensuring compliance with CRA regulations. Clients receive personalized guidance to optimize their corporate tax strategies.
Income Tax Preparation
We simplify complex personal tax filings, maximizing deductions and credits while ensuring compliance. Our team handles individual returns with attention to detail and confidentiality. Clients benefit from expert advice to minimize liabilities and avoid common filing errors.
Virtual CFO Services
Our virtual CFO services provide strategic financial oversight, including budgeting, cash flow management, and business planning. We act as a trusted advisor to support growth and operational efficiency. Clients gain access to expert insights without the cost of a full-time executive.
Not-For-Profit Accounting
We offer specialized accounting for churches and nonprofits, including T3010 returns, GST/HST rebates, and board reporting. Our team understands sector-specific requirements and compliance challenges. Clients receive tailored support to maintain transparency and regulatory adherence.
People
Denise Kiessling
Founder
Denise Kiessling, a Certified Professional Bookkeeper with 30+ years of experience, founded Kiessling & Associates in 2003. Her expertise spans accounting, tax compliance, and business operations. Denise prioritizes client relationships and continuous learning to deliver exceptional service.
Alix Scott
Senior Bookkeeper
Alix Scott, an Advanced QuickBooks Pro Advisor, has served as Senior Bookkeeper since 2017. She specializes in business tax compliance and technology-driven financial solutions. Alix helps clients optimize QuickBooks for efficient business management.
Peggy Sowerbutts
Bookkeeper
Peggy Sowerbutts brings 20+ years of business experience to her role as Bookkeeper. Her strengths include organization, client relations, and attention to detail. Peggy supports clients with accurate records and compliance-focused accounting.
Dianne M.
Accounting Technician
Dianne M., a member of the Association of Accounting Technicians, joined the team in 2024. She combines her MBA with practical accounting experience to support client needs. Dianne focuses on precision and client satisfaction.
Kirsten Bekker
Junior Bookkeeper
Kirsten Bekker joined in 2025, bringing enthusiasm and a commitment to learning. She excels in problem-solving and client service as a Junior Bookkeeper. Kirsten continues her education to enhance her technical and client support skills.
Questions
What accounting services do you offer?
We provide bookkeeping, tax preparation, virtual CFO services, and specialized accounting for nonprofits and corporations.
Do you handle corporate tax returns?
Yes, we prepare T2 corporate tax returns and year-end financial statements with strategic tax-saving advice.
Are you available outside regular hours?
We offer appointments outside regular hours by request to accommodate client schedules.
What areas do you serve?
We primarily serve Oshawa, Ontario, with virtual services available for clients across Canada.
How can I submit tax documents?
You can drop off documents in person during office hours or use our secure client portal for virtual submissions.
Do you offer virtual consultations?
Yes, we provide virtual consultations and ongoing support through our secure client portal and online tools.
