— SERVING SOUTHERN NH SMALL BUSINESSES
Bookkeeping that gives you a solid foundation.
We take the stress out of your finances so you can get back to doing what you love. With 30+ years of experience serving NH small businesses — accurate books, timely reports, a team that genuinely cares.
QuickBooks Certified ProAdvisor
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Trusted by NH Small Businesses
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Partner: SlatePayworx
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QuickBooks Certified ProAdvisor · Trusted by NH Small Businesses · Partner: SlatePayworx ·
— YOUR FINANCIAL FOUNDATION
You deserve breathing room — we handle the books.
Running a small business is hard enough. Managing your own bookkeeping on top of everything else? That's where things fall through the cracks — and where stress really starts to add up.
At Cornerstone, we come alongside NH business owners to do the financial heavy lifting. From weekly transaction entry to month-end reconciliations and year-end tax prep support, we keep your records accurate, timely, and always ready when you need them.
We're not just number crunchers — we're a locally-owned NH team that takes real pride in understanding your business and removing that financial weight from your shoulders.
Christine Comeau
CEO & Lead Bookkeeper
— WHAT WE DO
Everything your books need — handled with care.
A full range of bookkeeping and financial services tailored for NH small businesses with 2–20 employees.
Weekly & Monthly Bookkeeping
Transaction entry, accounts payable & receivable, and financial reporting — done consistently, every month.
Bank & Credit Card Reconciliation
Monthly cross-referencing of your statements to catch errors and ensure your financials are 100% accurate.
Tax Preparation Support
Year-end financial review and 1099 prep so there are no surprises when your tax preparer files.
QuickBooks Online & Desktop
Setup, management, and one-on-one training from a Certified QuickBooks ProAdvisor.
Not sure which services you need? Let's talk →
— WHY CHOOSE US
A bookkeeping team that feels like part of your business.
Here's what makes Cornerstone different from the rest.
30+ years of expertise
Deep experience in business bookkeeping, accounting, and NH tax office work.
Locally rooted in NH
A locally owned NH business that understands Southern NH's business landscape.
QuickBooks Certified Pro
Official ProAdvisor for QuickBooks Online and Desktop — one of few in the region.
Personal, responsive service
You'll always talk to a real person who knows your account — no ticket systems.
— WHAT OUR CLIENTS SAY
"Before Christine, I dreaded every month-end. Now I actually look forward to my financial reports because I know everything is right. It's been a complete game changer for my business."
· Derry, NH
"Christine took the time to truly understand how our business works. She's not just keeping our books — she's helping us make smarter decisions. Worth every penny."
· Salem, NH
"I tried to manage QuickBooks on my own for two years and always felt behind. Cornerstone set everything up and trained me — I actually understand my finances now."
· Hampstead, NH
— LET’S TALK
Ready to take bookkeeping off your plate?
Schedule a free, no-pressure consultation. We'll learn about your business and show you exactly how Cornerstone can help — no commitment, no jargon.
(603) 489-9400
Christine@cornerstonebookkeepingllc.net
20 Mary E Clarke, Unit 2, Hampstead, NH
We typically respond within 1 business day. Your information is never shared.Your books deserve a solid cornerstone.
Join NH small business owners who've handed off their bookkeeping stress — and never looked back.