Top 6 Bookkeepers in the Boulder Area, CO (2026)
Key Takeaways
- Flatiron Advisors, in Louisville, ranks first with an Evidence Score of 60 at 80% coverage.
- We reviewed 26 firms here; 9 of the 10 that met the listing bar reached 70% evidence coverage, and the 6 with at least 6 documented items are numbered.
- Pricing is hidden across the board: no firm here publishes a price, and 8 of 10 don't mention fees at all.
- Compared with every firm we list, this group stands out on reporting: 4 of 10 state how often reports arrive (40% against 21%).
Sources cited in this article: DNS check, Firm's own website, State business registry, and our published methodology.
26 profiles reviewed, 10 met the listing bar, 9 scored (evidence coverage of 70% or more). 6 document at least 6 of the items we score and are ranked by Evidence Score; the other 3 are under the list as Also scored.
Firms on this page have offices in Boulder (5), Longmont (4) and Louisville (1). The page covers 32 towns and cities in the metro area, and a firm elsewhere in Colorado appears on the state page.
How this list is built: Methodology · Disclosures · About · Report a correction
This list numbers the 6 Boulder bookkeeping firms with enough documented evidence to rank, out of 10 that met our listing bar, and scores 3 more below it without a number. Narrow it by need first. The filters above the list cover catch-up work (1 firm) and remote service (4).
Top 6 Bookkeepers in the Boulder Area, CO, Ranked by Evidence Score
- Flatiron Advisors (Louisville, CO). Evidence Score 60/100 at 80% coverage. Read the full profileDocuments 4 of 5 core services; states it prices by quote. Documented fit: technology, therapists; catch-up and cleanup work; QuickBooks Online users.Who they say they serve (self-reported): technology, therapists.
- Community Financials (Boulder, CO). Evidence Score 60/100 at 78% coverage. Read the full profileDocuments 3 of 5 core services; states it prices by quote; registered entity verified. Documented fit: technology.Who they say they serve (self-reported): technology.
- Trailhead Accounting Solutions CPA (Longmont, CO). Evidence Score 41/100 at 80% coverage. Read the full profileDocuments 2 of 5 core services; registered entity verified. Documented fit: Xero users.
- Delta Effects (Boulder, CO). Evidence Score 37/100 at 80% coverage. Read the full profileDocuments 3 of 5 core services; registered entity verified.
- Ellis Bottom Line Bookkeeping (Longmont, CO). Evidence Score 33/100 at 74% coverage. Read the full profileDocuments 2 of 5 core services; registered entity verified.
- Pieper & Company, LLC (Longmont, CO). Evidence Score 27/100 at 80% coverage. Read the full profileDocuments 2 of 5 core services. Documented fit: real estate.Who they say they serve (self-reported): real estate.
Also scored
These firms reached 70% evidence coverage, but fewer than 6 of the items we score are documented for them, so they carry a score and no number.
| Firm | Where | Services documented | Software | Pricing | Credentials verified | Coverage | Evidence Score |
|---|---|---|---|---|---|---|---|
| Kirkland & Company, CPA's, P.C. Says it serves: professional services | Longmont, CO | month-end close | Not verified | Not verified | Not verified | 78% | 27 |
| Scher Group Says it serves: medical, consultants | Boulder, CO | payroll coordination | Not verified | Not verified | Not verified | 76% | 25 |
| ABL&Co. Tax & Accounting | Boulder, CO Local + remote | payroll coordination | Not verified | Not verified | Not verified | 75% | 17 |
Top firms in Longmont
Trailhead Accounting Solutions CPA leads Longmont with an Evidence Score of 41/100 at 80% coverage. Also ranked in Longmont: Ellis Bottom Line Bookkeeping (33/100, 74% coverage), Pieper & Company, LLC (27/100, 80% coverage).
Top firms in Boulder
Community Financials leads Boulder with an Evidence Score of 60/100 at 78% coverage. Also ranked in Boulder: Delta Effects (37/100, 80% coverage).
Comparison table
| Firm | Where | Services documented | Software | Pricing | Credentials verified | Coverage | Evidence Score |
|---|---|---|---|---|---|---|---|
| Flatiron Advisors Says it serves: technology, therapists | Louisville, CO Local + remote | monthly bookkeeping, catch-up/cleanup, payroll coordination, month-end close | QuickBooks Online | Quote only (stated) | Not verified | 80% | 60 |
| Community Financials Says it serves: technology | Boulder, CO Local + remote | monthly bookkeeping, AP/AR, month-end close | Not verified | Quote only (stated) | Not verified | 78% | 60 |
| Trailhead Accounting Solutions CPA | Longmont, CO Local + remote | payroll coordination, month-end close | QuickBooks Online, Xero | Not verified | Not verified | 80% | 41 |
| Delta Effects | Boulder, CO | AP/AR, payroll coordination, month-end close | Not verified | Not verified | Not verified | 80% | 37 |
| Ellis Bottom Line Bookkeeping | Longmont, CO Local | AP/AR, payroll coordination | QuickBooks | Not verified | Not verified | 74% | 33 |
| Pieper & Company, LLC Says it serves: real estate | Longmont, CO | payroll coordination, month-end close | QuickBooks | Not verified | Not verified | 80% | 27 |
Also listed (not scored yet)
These firms met the listing bar but have under 70% evidence coverage, so they are not ranked.
| Firm | Where | Services documented | Software | Pricing | Credentials verified | Coverage |
|---|---|---|---|---|---|---|
| Arkose Advisors | Boulder, CO | Not verified | Not verified | Not verified | Not verified | 15% |
What the evidence shows
Pricing
No firm on this page puts a price on its website. 2 of 10 say they quote each client, and the other 8 say nothing about fees at all. That's less open than Colorado as a whole, where 12% publish a price. A written scope with the fee and its limits is the thing to ask for on a first call.
Licenses and public records
Because Colorado publishes its records as open data, the checks for this group found 0 firms with an active CPA license or permit on Colorado's published register and 6 with a business registration found in the state's registry data. Any firm that says it's a CPA practice can be checked on the Colorado State Board of Accountancy lookup.
The ranking
Numbered scores on this list run from 60 down to 27, and the median across every scored firm is 33. 3 more firms reached 70% coverage with fewer than 6 documented items, so they sit under the list as Also scored, without a number. The top of the list: Flatiron Advisors (60 at 80% coverage), Community Financials (60 at 78% coverage) and Trailhead Accounting Solutions CPA (41 at 80% coverage). Longmont has the most numbered firms (3), and the list spans 3 towns in all. A high-coverage firm with a modest score isn't a weak firm. Its site simply leaves more for you to ask.
Boulder area in figures
Shares of the 10 firms listed, from accepted evidence only. A firm with no evidence for an item counts as not stating it.
| Publish a price or starting price | 0% (0 of 10) |
|---|---|
| State they price by quote | 20% (2 of 10) |
| Say nothing about pricing | 80% (8 of 10) |
| Hold a third-party-verified credential | 0% (0 of 10) |
| State a reporting cadence | 40% (4 of 10) |
| Describe onboarding | 10% (1 of 10) |
| Offer catch-up or cleanup work | 10% (1 of 10) |
| Work remotely (stated) | 40% (4 of 10) |
| Most-mentioned software | QuickBooks 20%, QuickBooks Online 20%, Xero 10% |
| Median evidence coverage | 78% |
| Median Evidence Score (scored firms) | 33 |
Frequently Asked Questions
Do any Boulder bookkeepers publish their prices?
Not on their websites. 2 of 10 say they quote each client, and the rest don't mention fees. Ask for the monthly fee and what it covers in writing.
Which firms in Boulder take on catch-up bookkeeping?
Flatiron Advisors says it does catch-up or cleanup work.
Which Boulder bookkeepers work in Xero?
Trailhead Accounting Solutions CPA names Xero on its site. More firms here name QuickBooks, so ask which one a firm prefers before you switch anything.
Which Boulder bookkeepers say which industries they serve?
5 of 10 name them on their own sites, among them Flatiron Advisors (technology and therapists), Community Financials (technology), Pieper & Company, LLC (real estate), Kirkland & Company, CPA's, P.C. (professional services) and Scher Group (medical and consultants). It's self-reported, so ask for a client reference in your trade.
Every place this page covers (32)
Allenspark, Altona, Bark Ranch, Bonanza Mountain Estates, Boulder, Crisman, Eldora, Eldorado Springs, Erie, Gold Hill, Gunbarrel, Hidden Lake, Jamestown, Lafayette, Lazy Acres, Leyner, Longmont, Louisville, Lyons, Mountain Meadows, Nederland, Niwot, Paragon Estates, Pine Brook Hill, Seven Hills, St. Ann Highlands, Sugarloaf, Sunshine, Superior, Tall Timber, Valmont, Ward.
Sources and further reading
Dates are when we checked. Report an error.
- DNS checkChecked Sep 26, 2026
- Firm's own websiteChecked Sep 26, 2026
- State business registryChecked Sep 26, 2026
- Colorado State Board of Accountancy: license lookupColorado State Board of Accountancy
- Colorado business entity searchState of Colorado
- How the Evidence Score worksBookkeeping Index methodology
- Commercial disclosuresBookkeeping Index