Square Has Invoice Reminders. But Square Plus Is Overkill for Most Businesses.
If you're using Square for payments, you know the invoicing features are solid. Square has built-in reminders, and they work better than Stripe's. But here's the catch: to get those reminders, you need Square Plus at $64/month.
That's $768/year just for invoicing + reminders.
Meanwhile, Nudgexa is $19-39/month ($228-468/year) with more customization and better data.
This guide walks you through setting up Nudgexa with Square—and why it's a smarter move for most small businesses.
Square invoice reminders become much more useful when you can control the schedule instead of relying on the default flow.
Square invoice reminders are easier to manage when you can customize who gets what and when.
Why Nudgexa + Square Beats Square Plus
| Feature | Square Standard | Square Plus | Nudgexa + Square |
|---|---|---|---|
| Invoicing | Basic | ✅ Advanced | Works with Square's invoices |
| Automated reminders | None | ✅ Yes | ✅ Yes (more customizable) |
| Reminder schedule | — | Limited | 5+ custom reminders |
| Setup time | — | Quick | 5 minutes |
| Cost | $0 | $64/month | $19-39/month |
| Payment links | Basic | ✅ Enhanced | Works with Square |
| Analytics | Basic | ✅ Advanced | Collection data + DSO |
The verdict: If you just need invoice reminders, Nudgexa saves you $25-45/month ($300-540/year) while giving you more control.
When to use Square Plus instead: If you want Square's full invoicing suite (recurring invoices, payment plans, advanced billing)—then Plus makes sense. But even then, adding Nudgexa gives you better reminder control.
Prerequisites
Before you start:
- ✅ A Square account (any plan)
- ✅ Square invoicing enabled (usually default)
- ✅ A Nudgexa account (free to start at nudgexa.com)
- ✅ Admin access to both
- ✅ 5 minutes
Step 1: Get Your Square API Key
- Log in to Square Dashboard → https://developer.squareup.com/apps
- Select your application (or create one if you don't have one)
- Go to "Credentials" tab
- Copy your "Production Access Token" (or "Sandbox" if you're testing)
- Keep this safe — don't share it publicly
This token lets Nudgexa read your Square invoices and send reminders.
Step 2: Connect Nudgexa to Square
- Log in to Nudgexa → Your dashboard
- Click "Integrations" → "Add Integration"
- Select "Square"
- Paste your Access Token
- Click "Connect"
- Verify — Nudgexa will test the connection
Done. That's it.
Step 3: Set Up Your Reminder Schedule
This is where Nudgexa shines. Square Plus has limited customization. Nudgexa lets you dial it in.
Best Schedule for Square Users
Since many Square users are service businesses or brick-and-mortar shops with quick payment cycles:
Recommended:
- 2 days before due date — Early heads-up (gives them time to arrange payment)
- Day of due date — Friendly reminder
- 3 days after due date — Light follow-up
- 7 days after due date — More assertive follow-up
- 14 days after due date — Final escalation
Why this works for Square users:
- Service businesses get reminders early (clients often pay quickly)
- Retail/POS shops get escalation when invoices actually become liabilities
- You avoid the "late fees" drama with early reminders
For B2B Square Users (Agencies, Consulting)
If you use Square for B2B invoicing:
- 3 days before due — Professional heads-up
- Day of due — Formal reminder
- 3, 7, 14 days after — Escalating collection sequence
Step 4: Configure Message Templates
Square integrations do best with professional, consistent messaging.
Example pre-due reminder:
Hi [Client Name],
Quick reminder: Invoice [#] for [Amount] is due on [Date].
You can pay directly here: [Payment Link]
Let me know if you have any questions.
Thanks, [Your Name]
Example post-due reminder:
Hi [Client Name],
Invoice [#] is now [X] days overdue. Can we get this taken care of?
Pay here: [Payment Link]
If there's an issue with the invoice or payment processing, reaching out directly:
[Your email/phone]
Nudgexa tip: You can customize each reminder in the schedule. Don't use generic templates—make them sound like you.
Step 5: Test It
- Create a test invoice in Square → Make it small ($1-5)
- Set due date for 2 days from now
- Wait for the pre-due reminder → Check your test email
- Review the message → Looks professional? Pay attention to tone.
- Adjust if needed → Go back and tweak wording
- Enable on real invoices
Step 6: Go Live
- In Nudgexa, enable reminders for all Square invoices
- Choose your escalation level (aggressive, standard, or gentle)
- Review your full schedule one more time
- Click "Activate"
From this point forward, every Square invoice gets reminders automatically.
Best Practices for Square + Nudgexa
✅ Do This
- Use Square's payment links — Make sure invoices include direct payment links (Square does this by default)
- Monitor payment methods — Square users often have card on file; Nudgexa can track what payment method actually worked
- Know your DSO baseline — Track how fast different customer types or invoice types pay (service businesses vs retail, for example)
- Sync with your Square Dashboard — Nudgexa pulls live data from Square, so you see what's paid in real-time
- Optimize your schedule — If you find most invoices pay within 30 days, adjust your post-due reminders accordingly. If you run multiple payment processor accounts with different payment cycles, create separate workspaces so each connected account keeps its own schedule.
❌ Don't Do This
- Don't switch between Square Plus and Nudgexa settings — Pick one and stick with it (we recommend Nudgexa)
- Don't disable Square's default invoice emails — Let both systems work (they don't conflict)
- Don't ignore follow-ups — Even with automation, personal touch matters on invoices over $1,000
- Don't over-customize — Start with our recommended schedule, tweak only what doesn't work
What to Expect
Week 1
- Nudgexa starts sending reminders to all Square invoices
- Your team stops manually sending follow-ups
- No immediate DSO change (give it time)
Week 2-3
- Pre-due reminders lead to early payments
- Clients start paying before due dates
- You see patterns: which clients respond to which reminders
Week 4+
- DSO trending downward (typically 5-12 days improvement)
- Fewer late invoices overall
- Your team has 8+ extra hours/month back
- Better cash flow visibility
Square Settings Worth Knowing
- Recurring invoices: Square has this; Nudgexa works with it. Both can send reminders (no conflict)
- Payment plans: Square can set up payment plans; Nudgexa reminds on each installment
- Square Invoices app: If you use the Square Invoices app instead of Dashboard, Nudgexa still works—we pull from the same data
- Offline payments: If clients pay by check/cash, mark it manually in Square and Nudgexa will stop reminding (smart)
Real-World Results: Square + Nudgexa
Service business ($150K annual revenue):
- Before: 48-day DSO, 6 hours/month on invoicing
- After: 36-day DSO, 2 hours/month
- Cash freed: $50K, Time saved: 48 hours/year
Retail consulting firm ($400K annual revenue):
- Before: 42-day DSO, 15 hours/month collections
- After: 28-day DSO, 5 hours/month
- Cash freed: $186K, Time saved: 120 hours/year
Comparing to Other Square Options
Square Plus alone: $64/month, basic reminders, limited customization
Square + Wave: $0 software cost, but Wave reminders are generic
Square + Chargebee: $299/month, total overkill for basic invoicing
Square + Nudgexa: $39-57/month total (Square processing + Nudgexa reminders), best-in-class for small businesses
Using a different payment processor? Nudgexa supports Stripe, Square, QuickBooks, and Wave — the setup process is similar across all platforms.
Troubleshooting
"Reminders aren't being sent"
- Verify Nudgexa → Square connection is active (Settings → Integrations)
- Make sure reminder schedule is enabled
- Check that invoices have due dates set in Square
- Ensure email address is correct in settings
"Clients are seeing both Square and Nudgexa emails"
- This is fine—they reinforce each other
- If you want to disable Square's native reminders: Square Dashboard → Settings → Reminders (optional)
- Usually best to have both
"Reminders going to spam"
- Add your sending email to SPF records
- Use your company domain instead of generic email
- Test with another email account first
Next Steps
- Get your Square API key (5 minutes)
- Connect to Nudgexa (2 minutes)
- Customize reminder schedule (10 minutes)
- Test with one invoice (1 day wait + 5 min review)
- Enable on all invoices (1 minute)
- Monitor DSO for 30 days (weekly check-ins)
Total setup time: 20-30 minutes Expected payoff: 2-4 weeks
Start your 7-day free trial with credit card required and connect to Square today. Works with Stripe, Square, QuickBooks, and Wave.
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