TaxDome vs. Canopy vs. Karbon: Client Payment Fees Compared

On this page 7 sections

1. TaxDome vs. Canopy vs. Karbon: How Each Platform Handles Client Payments
2. Card and ACH Rates Side by Side
3. Recurring Billing for Monthly Bookkeeping Clients
4. Payment-Before-Delivery: Locking Returns Until Paid
5. Can You Bring Your Own Processor?
6. Total Annual Cost at 100, 300, and 1,000 Clients
7. Next Steps

Key takeaways

• Built-in payments save setup time, but the card rate, ACH pricing and processor lock-in decide what you pay each year.
• Payment mix matters most. Shifting recurring bookkeeping clients to ACH autopay usually lowers costs more than switching platforms.
• Payment-before-delivery locks are useful, but professional standards on client records still apply, so confirm the rules with your state board.
• A separate merchant account is worth the extra setup when your volume is high enough that small rate differences add up, or when you need pricing programs the platform doesn't support.

If you're weighing TaxDome vs. Canopy, and adding Karbon to the shortlist, client payments are easy to overlook. Workflow, client portals and e-signatures get most of the attention, but the payment feature becomes a recurring cost on every invoice you collect. This guide covers how each platform's built-in payments work, what to compare on card and ACH pricing, how autopay and payment-before-delivery affect cash flow, and when it makes sense to run payments through your own merchant account.

One note before the comparison. All three vendors change their payment pricing, and some tie it to plan tier or volume. This article does not list their current rates. Instead it shows you which numbers to collect and how to model them. Check each vendor's pricing page and payment terms before you decide.

TaxDome vs. Canopy vs. Karbon: How Each Platform Handles Client Payments

All three platforms market integrated client payments. Clients pay invoices from the portal or an emailed link, and the payment posts to the client record without manual reconciliation. That automation is the main reason firms use built-in payments: no re-keying, no matching deposits to invoices in a spreadsheet, and fewer "did you get my check?" emails during tax season.

The differences that matter for your costs usually fall into four areas:

• Who processes the payment. Built-in payment tools generally run on a third-party processor or payment facilitator. You agree to that provider's terms, including fees, payout timing, reserves and dispute handling.
• How pricing is set. Is it a flat percentage for cards, a percentage or flat fee for ACH, or tiered by plan? Are there monthly minimums or per-dispute fees?
• What automation is included. Recurring invoices, saved payment methods, autopay and document locks vary by platform and plan.
• Whether you can use another processor. Some platforms only support their own payment option. Others may allow outside integrations.

When you request demos, ask each vendor to put those four answers in writing. TaxDome payment processing, Canopy's payments pricing and Karbon's payments fees are easier to compare once each answer sits on the same worksheet.

Card and ACH Rates Side by Side

Look past the headline rate. A low card percentage can still cost more if ACH is expensive, payouts are slow or dispute fees are high.

What to Collect From Each Vendor

Why Card Payments Cost More Than You Expect

Client portal payments are card-not-present transactions, and those typically cost more than in-person payments because they carry more fraud risk. For background, see our guide on why online and keyed transactions cost more to process. Business and rewards cards also tend to carry higher interchange, and many accounting clients pay with exactly those cards.

For a broader benchmark of what firms pay across processors, read CPA credit card processing fees and what accounting firms should pay.

Recurring Billing for Monthly Bookkeeping Clients

Monthly bookkeeping, payroll and advisory retainers are where accounting practice management payments either save you hours or create a collections headache.

Features to Verify

• Recurring invoices that generate automatically on a set schedule
• Saved payment methods with client authorization for future charges
• Autopay that charges the saved method when the invoice is issued
• Failed-payment handling: automatic retries, client notifications and a staff alert
• Card updating so expired or reissued cards don't break autopay
• ACH as the default option on recurring invoices, if you want to steer clients toward lower-cost payments

Authorization and Consent

Recurring charges need clear client authorization. ACH network rules require authorization for recurring debits, and some states have automatic renewal laws that may apply to ongoing service arrangements. Put the billing frequency, amount or calculation method, cancellation terms and payment method in your engagement letter. Our overview of automatic renewal laws by state is a useful starting point. This is general information, not legal advice, so confirm your obligations with a qualified professional.

Clear authorization also helps when a client disputes a charge months later. A signed engagement letter, portal activity logs and delivered work are the core of a solid response. See how chargebacks work, step by step for the full process.

Payment-Before-Delivery: Locking Returns Until Paid

Many firms want to hold the finished return, financial statements or other deliverables until the invoice is paid. Practice management platforms often promote document locks or payment-gated downloads for this purpose. Confirm whether each platform supports it on your plan and how it behaves, for example whether the client can view but not download, and whether the lock releases automatically when ACH is initiated or only after it settles.

Things to Consider Before You Turn It On

• Professional standards. Rules on withholding client records differ between client-provided records and your work product, and state boards of accountancy may have their own requirements. Check with your state board or professional counsel before you rely on a lock.
• ACH timing. ACH payments take longer to settle than cards. If a lock releases when payment is initiated, a later return means you have delivered unpaid work.
• Engagement letter language. State plainly that deliverables are released on payment. That reduces disputes and supports your evidence if one happens.
• Deadline pressure. A client who can't download a return on deadline day will call. Decide your exception process ahead of time.

Used carefully, payment-before-delivery cuts receivables more effectively than reminder emails, because the client pays at the moment they want the work.

Can You Bring Your Own Processor?

Processor lock-in is the most important question in this comparison and the one most often left out of demos. If a platform only supports its built-in payments, you accept its rates and terms as long as you stay on the platform.

Your Options If a Platform Is Locked In

1. Use the built-in option for everything. You get full automation and pay the platform's rates.
2. Use built-in payments for small invoices and your own merchant account for large ones. For example, you might collect a large annual tax prep fee through a virtual terminal for keyed card payments or a payment link. You lose automatic reconciliation on those invoices, so someone has to mark them paid.
3. Steer clients to ACH or check for large balances, and keep built-in card payments for convenience.

When Your Own Merchant Account Is Worth the Setup

A separate merchant account adds work: an application, underwriting, a gateway, and either reconciliation or an accounting integration such as QuickBooks. It tends to be worth it when:

• Your annual card volume is large enough that a fraction of a percentage point adds up to real money
• You want interchange-plus pricing instead of a flat rate. See interchange-plus vs. flat-rate pricing for how the two compare.
• You want to pass costs through with surcharging where permitted or dual pricing. Card network rules and state laws restrict both, so confirm what applies to your firm.
• You also take payments in the office, at client meetings or through a separate website gateway

MannyPay provides merchant accounts, online payment gateways including Authorize.net and NMI, and virtual terminals for professional services firms. Accounting firms are generally considered low-risk by processors, though approval always depends on underwriting.

Total Annual Cost at 100, 300, and 1,000 Clients

The numbers below are illustrative only. They are not the rates of TaxDome, Canopy, Karbon or MannyPay. They show how volume and payment mix drive your total.

Illustrative assumptions: each client pays $3,000 a year (12 invoices of $250), card payments cost 3.0% all-in and ACH costs 1.0%.

Scenario a: Half Card, Half ACH (By Dollars)

Scenario B: 20% Card, 80% ACH

What the Illustration Shows

• Payment mix matters most. Moving clients to ACH autopay cut illustrative costs by 30% at every client count, without changing platforms.
• Small rate gaps compound. In Scenario A, each 0.25 percentage point difference on card volume works out to about $375 a year at 100 clients, $1,125 at 300 and $3,750 at 1,000 (illustrative).
• ACH pricing structure matters. A percentage-based ACH fee grows with invoice size, while a flat or capped fee does not. On large annual invoices the difference can be significant.

Run the same model using each vendor's confirmed rates and your actual billing data. Use last year's invoices, split by card and ACH.

Next Steps

1. Pull last year's billings and note how many dollars came in by card, ACH and check.
2. Ask TaxDome, Canopy and Karbon for written payment terms: rates, ACH fees, dispute fees, payout timing and whether outside processors are supported.
3. Plug the confirmed numbers into the model above.
4. Talk to your state board or counsel about payment-before-delivery and records policies.
5. If lock-in or volume makes your own merchant account worth considering, review 12 questions to ask a merchant service provider, then request a free processing quote from MannyPay. A MannyPay specialist responds within one business day.

ME

About the author

MannyPay Editorial Team

Beyond the Swipe's editorial desk researches the publication's guides and news and cites its sources in every article. Articles reviewed by a named MannyPay editor carry that editor's byline.

This article is for general educational purposes and is not legal, tax or financial advice. Card network rules and state laws change; confirm current requirements for your business.