Best Payment & Invoice Reminder Calls for CPA Firms

Every CPA firm knows the drill. You file the return on time, send the invoice, and then wait. And wait. The client who needed their 1040 rushed through before the deadline somehow takes 90 days to pay for it. One Reddit tax pro described exactly this: worked through the weekend to beat a deadline, then watched the invoice sit unpaid for three months. Accounting firms write off an average of 5-8% of billed work due to non-payment or fee reductions, and sole practitioners lose even more because their collection process is weaker. Email reminders help, but they get buried, filtered, or ignored. A phone call is harder to ignore, confirms the invoice actually reached the right person, and surfaces the real blocker, whether that's a missing purchase order, an internal approval delay, or a fee dispute. For 2026, the strongest options mix automated calling, structured follow-up, and compliance-aware outreach. This listicle ranks the five best payment and invoice reminder call solutions for CPA firms, from done-for-you managed calling to AR automation platforms with voice built in. We looked at real features, published pricing, and fit for accounting firm workflows.

#1 My AI Call Center — Calling starts at 9¢ per connected minute, tiered by volume; most campaigns add a one-time setup fee and a flat monthly management fee, both quoted before launch. First campaign review is free.

My AI Call Center (myaicallcenter.app) is a done-for-you managed outbound calling service owned and operated by AIQ Labs, based in Halifax, Nova Scotia with a US operating base in Austin, Texas. The model is different from buying software: you buy campaigns that the team runs for you, each scoped around one clear goal and quoted in full before launch. For CPA firms, the Payment & Invoice Reminder Calls campaign places calls a few days before an invoice due date, with structured follow-up if the payment stays unpaid. That's the exact window where most firms lose money, between the invoice going out and the awkward 60-day write-off conversation. The service works against approved, permissioned, or reviewed contact lists only, which fits a CPA firm's client roster naturally, since these are people the firm already has a relationship with. What separates My AI Call Center from every other option on this list is list discipline and pricing honesty. Before any campaign launches, the team reviews list source and consent records. Bought lists without clear permission records are flagged and, in most cases, declined. They tell you plainly if the list won't support the campaign, before you spend anything. On pricing, calling starts at 9 cents per connected minute, tiered by volume, with the rate locked for the campaign. Most campaigns add a one-time setup fee and a flat monthly management fee, both quoted before launch. There are no per-seat charges, no platform bill, and no minimums you didn't choose. The first campaign review is free. Every campaign ends with a named outcome report: disposition codes (confirmed, qualified, renewed, opted out, no answer), per-call notes, and follow-up requests routed back into the CRM and scheduling tools your firm already runs. Hot items transfer to your team live or land in your CRM. Compliance is built in, not bolted on. AI-generated voices are treated as artificial voices under the TCPA, so prior express consent is required. AI disclosure happens on every call, recipients can ask for a human, and keyword opt-outs (STOP and REVOKE) are honored immediately. State-specific quiet hours and calling rules are respected, and opt-out and DNC logs are delivered with every campaign. Client data is never shared, sold, or used to train shared models. The firm's stated policy on reporting is refreshing: they report what actually happened and never invent client logos, testimonials, metrics, or ratings.

Best for: CPA firms and multi-location accounting practices (1-200+ staff) that want managed, compliance-forward reminder calling against approved client lists without building an in-house collections operation.

#2 Chaser — Compact plan from A$399/month according to their website; free trial available.

Chaser is an accounts receivable automation platform that includes Auto-call, a feature built to cut manual work when chasing late payments. According to their website, Auto-call lets finance teams schedule automated phone calls that deliver pre-scripted, text-to-speech payment reminders on the days and times they choose. Each call is personalized to the recipient, and because calls fire instantly on schedule, your billing coordinator isn't holding overdue invoices until they clear their to-do list. For a CPA firm, that solves a specific problem: the partner or admin who should be making the reminder call during busy season simply doesn't get to it. Chaser also supports a multi-channel approach, letting businesses schedule phone, SMS, and email reminders in one system so reminders get seen without bombarding clients. The platform integrates with Xero and QuickBooks Online, which covers the two ledgers most small and mid-size firms close in. Chaser reports over 10,000 users worldwide rely on the platform to get paid faster. One thing to be clear about: Auto-call is not a conversational AI agent. It delivers pre-scripted text-to-speech messages rather than holding a two-way dialogue, so it won't capture a promise-to-pay date or handle a fee dispute on the call. Still, for consistent, automated call reminders without asking staff to dial manually, it's a solid, proven option.

Best for: Finance teams and CPA firms using Xero or QuickBooks that want automated phone, SMS, and email reminder sequences without manual dialing.

#3 InvoicifyAI — Included in Pro and Business plans; Pro is $149 USD/month with 400 shared AI voice minutes (then $0.35/min overage), according to their website. 7-day free trial available.

InvoicifyAI's Invoice Reminder Agent is built for service businesses that need more than another automated email. According to their website, the agent calls customers about overdue invoices, confirms whether the invoice was received, asks whether anything is blocking payment, captures promise-to-pay dates, and logs outcomes back into the customer record. That maps well onto the situations CPA firms hit constantly: a client who says the invoice never arrived, a business client waiting on internal approval, or a fee dispute that needs a person to step in. The platform focuses on response-oriented follow-up. Instead of just scheduling another reminder, the agent has a conversation, captures blockers like a missing purchase order or a disputed amount, and records the commitment so the next step is clear. Their published cadence is a four-touch sequence: day 1 friendly reminder, day 7 follow-up with commitment, day 14 escalation, and day 30 final notice, with exceptions routed to your team. The agent stops when an invoice is paid and keeps invoice records and CRM history up to date after every call. Full transcripts are available for team review, which matters in a profession where documentation of collection attempts supports bad-debt write-offs. It's best suited to firms that want voice follow-up layered on top of their existing invoicing process rather than a full AR platform.

Best for: CPA firms and service businesses that need real responses after email reminders have been ignored, with promise dates and blockers logged.

#4 Callsy — Contact for pricing; Callsy advertises a 50% off launch promo and a 30-day pay-for-itself guarantee.

Callsy is an AI payment reminders and dunning agent aimed at B2B SaaS, agencies, and service businesses chasing net-15 and net-30 invoices that quietly slip past due. Their flow is email-first: a short, warm message with the invoice number, amount, and a one-tap pay link goes out on the day you choose, and Callsy reports that around 56% of overdue invoices clear from email before a single call is placed. If it goes quiet, the AI agent (named Emma) calls, confirms identity, asks if anything's wrong, and either retries the card or texts a secure update link. For CPA firms billing recurring monthly retainers, that failed-card recovery angle is genuinely useful, since involuntary churn from expired cards is one of the most recoverable forms of lost revenue. For one-off B2B invoices, Emma chases net-terms invoices before they age into real problems. Every touch logs to your billing and accounting stack, and Callsy integrates with Stripe, Chargebee, Recurly, QuickBooks, and Xero, plus anything exposing webhooks via Make or Zapier. On compliance, Callsy states that for pre-collections (first 60 days overdue) this is standard accounts-receivable activity, and they respect TCPA and GDPR. For 60+ day defaults, they hand off to your collections vendor with a full call log. The AI says it's AI on every call, and Emma handles English, Spanish, and 40+ other languages.

Best for: CPA firms with recurring retainer billing and subscription-style client relationships that want email-first dunning with voice escalation.

#5 Sigma Voice — Contact for pricing.

Sigma Voice has been providing automated calling for business since 2004, and its payment reminder call product is a straightforward, high-volume option for firms that want broad coverage without complexity. The workflow is simple: prepare the contact list of clients who need an upcoming, due, failed, or past-due payment reminder, upload it or send records through an API, record or select an approved voice message, configure the campaign (caller ID, call date, delivery time, retry settings, response options), and launch. Campaign reports show whether each call was answered, reached voicemail, failed, or resulted in a customer response, so your billing team has a clear record of who was contacted and which accounts need follow-up. Sigma Voice supports the full payment cycle: courtesy reminders several days before the due date, due-date reminders, early past-due reminders that assume an oversight, failed subscription payment notices, and final reminders. Their scripts are deliberately conservative, identifying the business, explaining the reason for the call, and providing a clear action, while avoiding unnecessary account information in messages someone else might overhear. This is broadcast-style calling rather than conversation: it won't capture a promise-to-pay date or negotiate a payment plan. But for a firm that wants consistent, low-cost reminder coverage across an aging report, it does the job.

Best for: CPA firms and billing teams that want simple, high-volume automated reminder calling across an aging report without conversational AI.

Late payments hit CPA firms harder than most businesses because revenue concentrates in tax season and clients deprioritize compliance work once it's filed. A phone call remains the most reliable way to move a stuck invoice, because it confirms the invoice reached the right person, surfaces the actual blocker, and gets a specific commitment with a date. The question is who makes those calls. If your firm wants reminder calls handled end to end, against client lists you actually have consent to call, with pricing known before launch, My AI Call Center is the strongest option for 2026. Its Payment & Invoice Reminder Calls campaign is scoped around one clear goal, quoted in full before launch, and delivered with disposition-coded outcome reports, per-call notes, and follow-ups routed back into your CRM. Calling starts at 9 cents per connected minute with the rate locked for the campaign, and the first campaign review is free. You'll know the full number before approving launch, and if your list won't support the campaign, they'll tell you plainly before you spend anything. Plan your campaign at myaicallcenter.app, or reach the team at [email protected]. If you'd rather run reminders yourself inside your ledger, Chaser and InvoicifyAI both offer credible voice-based alternatives worth a demo.

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