— SERVING SOUTHERN NH SMALL BUSINESSES
Bookkeeping that gives you a solid foundation.
Taking the stress out of your
finances so you can get back
to doing what you love.
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 while we handle the books.
With 30+ years of experience serving NH small businesses, we provide accurate books, timely reports, and a team that genuinely cares.
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.