BillPulse

Track client payments and generate month-end reports instantly.

BillPulse is a billing and payment tracking tool for small businesses and freelancers who need to record client invoices, mark payment status, and produce month-end summaries automatically. It links with Google Sheets and generates PDF reports showing who paid, who is outstanding, and the remaining balance, reducing manual reconciliation and follow-up work.

Business Goals

  • Increase monthly active usage by 30% within 6 months through recurring billing/reporting workflows.
  • Reduce manual month-end reporting time by 70% within 90 days for paying customers.
  • Achieve a 25% conversion rate from free trial to paid plan within 120 days.
  • Reach 90% report generation success rate on first attempt within 3 months.
  • Maintain less than 2% monthly churn among active customers after the first 6 months.

User Goals

  • Upload or enter client bills quickly with amount and payment status.
  • See at a glance which clients have paid and which still owe money.
  • Generate a polished PDF month-end report automatically.
  • Sync billing data to Google Sheets without duplicate entry.
  • Export accurate outstanding totals for follow-up and accounting.

Non-Goals

  • Not a full accounting or bookkeeping system.
  • Not a payment processor or invoicing checkout platform.
  • Not a CRM for sales pipeline management.
  • Not built for complex multi-currency tax calculations in the first release.

Freelancer Amina, 34 - Amina manages 10 to 20 recurring clients and tracks payments in spreadsheets. She needs a faster way to record bill amounts, see overdue balances, and send monthly summaries to clients or her accountant.

Freelancer Amina, 34

  • As a freelancer, I want to upload or enter a bill with client name, amount, and due date, so that I can track what each client owes.
  • As a freelancer, I want to generate a PDF at month end showing paid and unpaid bills, so that I can share a clean summary with stakeholders.
  • As a freelancer, I want my data synced to Google Sheets, so that I can keep my existing workflow and backup records.

Small Agency Owner Daniel, 41 - Daniel runs a small agency with multiple client retainers and frequent partial payments. He needs a reliable month-end view of collection status without manually reconciling spreadsheets.

Small Agency Owner Daniel, 41

  • As an agency owner, I want to mark invoices as paid, partially paid, or unpaid, so that outstanding balances are accurate.
  • As an agency owner, I want automated month-end report generation, so that my team does not spend hours compiling payment status.
  • As an agency owner, I want filters by client and month, so that I can investigate late payments quickly.

Office Admin Grace, 29 - Grace supports a consulting firm and is responsible for updating records and sending monthly finance reports. She needs a simple interface that reduces errors and keeps records consistent across tools.

Office Admin Grace, 29

  • As an office admin, I want validation when uploading bill data, so that I avoid broken records and missing amounts.
  • As an office admin, I want the report to list outstanding amounts clearly, so that finance can follow up on unpaid balances.
  • As an office admin, I want role-based access, so that only authorized staff can edit payment records.

Bill Capture and Management · High priority

  • Users must be able to create and manage bill records with the essential fields needed for month-end reporting.
  • Support manual entry and CSV upload of bills with client name, invoice/bill number, amount, due date, payment status, and notes.
  • Allow editing and deleting records with an audit trail of who changed what and when.
  • Validate required fields before save, including non-negative amounts and valid date formats.
  • Support partial payment amounts and auto-calculate outstanding balance.
  • Prevent duplicate invoice numbers per client within the same account.

Payment Status Tracking · High priority

  • Users need clear, reliable payment state tracking so reports accurately separate paid, unpaid, and partially paid bills.
  • Provide status options: paid, unpaid, partial, overdue.
  • Auto-update overdue status based on due date when status is not paid.
  • Display outstanding balance in the bill list and in reports.
  • Allow bulk status updates for multiple bills at once.
  • Record payment date and optional reference number for paid bills.

Google Sheets Synchronization · High priority

  • The product must connect to Google Sheets so users can preserve their spreadsheet-based workflow and share data externally.
  • OAuth connection to Google Sheets with user consent.
  • Create or map to a selected sheet tab and sync bill rows bidirectionally or one-way, depending on account settings.
  • Map core fields to sheet columns and warn on missing or renamed columns.
  • Queue sync jobs and show sync status, last successful sync time, and failures.
  • Prevent duplicate row creation by using internal record IDs.

Month-End PDF Reporting · High priority

  • The app must automatically generate a clean monthly PDF report summarizing all paid and unpaid bills with outstanding totals.
  • Generate a PDF for a selected month, defaulting to the current month on month-end.
  • Include client name, bill number, amount, status, paid amount, outstanding amount, and totals summary.
  • Separate sections for paid and unpaid bills, with grand totals and outstanding total.
  • Allow download, email-ready attachment export, and versioned report history.
  • Handle empty months gracefully with a no-activity summary page.

Search, Filtering, and Auditability · Medium priority

  • Users need fast retrieval and confidence in the accuracy of financial records.
  • Filter by client, status, month, due date, and outstanding amount range.
  • Provide searchable history across bills and generated reports.
  • Keep an immutable report log with timestamp and source data snapshot.
  • Show validation errors and sync errors in a dedicated activity feed.
  • Support export to CSV in addition to PDF for finance teams.

Fast Setup and First Report

  • Sign up with email or Google account.
  • Connect Google Sheets or skip and start with local records.
  • Upload CSV or add the first bill manually.
  • Review field mapping and validate the imported data.
  • Generate the first month-end PDF report in under 10 minutes.
  • See sync status and next scheduled report immediately after setup.

1. Add Bills

  • The user creates bill records manually or by importing a spreadsheet.
  • Require client name, amount, and payment status before save.
  • Show inline validation for negative amounts, missing names, or invalid dates.
  • Support drag-and-drop CSV upload and paste-from-clipboard entry.

2. Track Payment Status

  • The user marks bills as paid, unpaid, partial, or overdue as collections progress.
  • Outstanding amount updates automatically when partial payment is entered.
  • Highlight overdue items based on due date rules.
  • Allow bulk updates for several bills at once.

3. Sync to Google Sheets

  • The user links or updates a Google Sheet so records stay accessible in a familiar format.
  • Let the user choose an existing sheet or create a new one.
  • Display sync success, failures, and last updated time.
  • Retry failed syncs automatically with exponential backoff.

4. Generate Month-End PDF

  • The user selects a month and produces a report that separates paid and unpaid bills.
  • Include totals paid, totals unpaid, and overall outstanding amount.
  • Render a professional PDF layout with page numbers and company header.
  • Block generation if critical data is missing and explain what needs fixing.

5. Share and Review

  • The user downloads, emails, or archives the report for accounting and client follow-up.
  • Provide report history with timestamps and status.
  • Allow re-generation if bill data changes after a report is created.
  • Keep report snapshots for audit purposes.

Power Features and Edge Cases

  • Recurring month-end report scheduling and automatic email delivery.
  • Partial payment reconciliation across multiple payments per bill.
  • Multi-user team access with roles for admin, editor, and viewer.
  • Custom report templates with logo and company details.
  • Support for multiple Google Sheets workspaces and separate client folders.
  • Offline draft entry with sync when connectivity returns.

Clean, Trustworthy Finance UI

  • A table-first interface with strong status colors and clear outstanding totals.
  • Mobile-friendly forms with large touch targets for quick updates.
  • Accessible contrast ratios, keyboard navigation, and screen-reader labels for all fields.
  • Fast PDF preview generation with loading states under 2 seconds for common report sizes.
  • Prominent sync health indicators so users know data is current.

Amina used to spend the last two days of every month opening spreadsheets, checking which clients had paid, and manually building a PDF summary. Small errors in formulas meant she often had to recheck totals before sending anything to her accountant.

With BillPulse, she uploads invoices once, marks payment status as it changes, and links the account to Google Sheets for backup and sharing. At month end, the app generates a PDF that clearly separates paid and unpaid bills, shows the outstanding amount, and gives her a finished report in minutes instead of hours.

That saves Amina time, reduces mistakes, and gives her a consistent billing process she can trust as her client list grows.

User-Centric Metrics

  • 90% of users can add their first bill within 5 minutes of signup.
  • 80% of active users generate at least one monthly PDF report within the first 30 days.
  • Reduce manual reconciliation time by 70% versus spreadsheet-only workflows.
  • Keep report accuracy complaints below 1% of generated reports.
  • Achieve a 4.5/5 average satisfaction score for the reporting workflow.

Business Metrics

  • 25% trial-to-paid conversion within 120 days.
  • 60% 3-month retention among active accounts.
  • 20% month-over-month growth in monthly active accounts for the first 6 months.
  • Less than 2% monthly churn among paying customers after onboarding.
  • At least 40% of paid users connect Google Sheets within their first week.

Technical Metrics

  • 99.9% monthly uptime.
  • PDF generation completes in under 10 seconds for reports up to 2,000 rows.
  • Google Sheets sync succeeds on the first retry for 95% of transient failures.
  • All sensitive data encrypted in transit and at rest with zero critical security incidents.

Tracking Plan

  • Track signup_completed with source and account type.
  • Track bill_created with entry method manual, CSV, or import.
  • Track payment_status_updated with old and new status.
  • Track google_sheets_connected and sync_status_updated.
  • Track pdf_report_generated with month, row count, and generation time.
  • Track report_downloaded and report_shared.
  • Track validation_error and sync_error with reason codes.

Technical Needs

  • Frontend in Next.js with TypeScript for fast UI and server-side rendering.
  • Backend API using Node.js with a PostgreSQL database.
  • Background jobs for sync and report generation using a queue such as BullMQ or Cloud Tasks.
  • PDF generation via a server-side renderer such as Puppeteer or Playwright.
  • Google OAuth and Sheets API integration with secure token storage.
  • File storage for generated PDFs using Amazon S3 or Google Cloud Storage.
  • Observability with structured logs, metrics, and error tracking such as Sentry and OpenTelemetry.

Integration Points

  • Google OAuth 2.0 for user authentication and consent.
  • Google Sheets API for sheet sync and row mapping.
  • Email delivery via SendGrid or Postmark for sharing reports.
  • Object storage for PDF downloads and archival.
  • Optional accounting export webhook for future QuickBooks or Xero integration.

Data Storage & Privacy

  • Store bill and payment data in a tenant-isolated schema with strict account scoping.
  • Encrypt tokens and sensitive fields at rest, and use HTTPS for all traffic.
  • Provide data export and deletion flows to support GDPR and CCPA requests.
  • Log access to reports and edits for auditability.
  • Define retention rules for generated reports and sync logs, with configurable deletion after a set period.

Scalability & Performance

  • Support asynchronous PDF generation so large reports do not block the UI.
  • Use database indexes on client, due date, status, and month for fast filtering.
  • Cache recent report summaries to speed up dashboard loads.
  • Design sync jobs to handle bursts from multiple accounts at month end.

Potential Challenges

  • Google Sheets column mapping may break when users rename headers; mitigate with stable internal IDs and a mapping review screen.
  • PDFs can become slow on large datasets; mitigate with background jobs, pagination, and row limits per page.
  • Partial payments create reconciliation complexity; mitigate with explicit paid amount and outstanding balance calculations.
  • Duplicate or conflicting edits across app and Sheets could cause inconsistencies; mitigate with sync conflict detection and last-write audit logs.
  • Month-end traffic spikes may slow report generation; mitigate with autoscaling workers and queued job priorities.

Team & resourcing - Small team - 2 engineers, 1 designer, part-time PM, and shared QA support

Phase 1: MVP Billing Core · Weeks 1-4

  • User authentication and workspace setup
  • Manual bill entry and CSV import
  • Payment status tracking with outstanding calculations
  • Basic dashboard and searchable bill list

Phase 2: Google Sheets Sync · Weeks 5-7

  • Google OAuth connection
  • Sheet selection and field mapping
  • One-way or bidirectional sync settings
  • Sync status, retries, and error reporting

Phase 3: PDF Reporting · Weeks 8-10

  • Month-end PDF generator
  • Paid and unpaid sections with totals
  • Report history and download center
  • Email share option for generated reports

Phase 4: Reliability and Scale · Weeks 11-12

  • Role-based access and audit logs
  • Improved analytics and tracking events
  • Performance tuning for large reports
  • Accessibility polish and edge-case hardening

Paste this into Cursor, Bolt, Lovable, or v0 to start building.

Build a web app called BillPulse for small businesses and freelancers to track client bills, payment status, Google Sheets sync, and month-end PDF report generation.

Use Next.js 14, TypeScript, Tailwind CSS, Prisma, PostgreSQL, NextAuth, BullMQ, and AWS S3 or equivalent object storage. Include Google OAuth login and Google Sheets API integration.

Core requirements:
1) Users can create, edit, delete, and bulk-update bill records with fields: client name, invoice/bill number, amount, paid amount, outstanding amount, payment status, due date, payment date, notes, and external sheet row ID.
2) Support CSV import and manual entry.
3) Payment statuses: paid, unpaid, partial, overdue. Automatically calculate outstanding amount and overdue state.
4) Allow connection to Google Sheets, mapping internal fields to columns, and syncing bill rows with sync history and error handling.
5) Generate month-end PDF reports that include paid bills, unpaid bills, totals paid, total outstanding, and a clean branded layout. Store generated PDFs and allow download and share-by-email.
6) Provide dashboard, bills table with filters, bill detail drawer, sync settings, report history, and report generation screen.
7) Include audit logs, validation messages, loading states, empty states, and accessible keyboard navigation.

Data model:
User, Workspace, Client, Bill, Payment, Report, SheetConnection, SyncJob, AuditLog.

API/endpoints or server actions should cover auth, bills CRUD, imports, sheet sync, report generation, report download, and analytics events.

Build a responsive UI with a table-first admin experience, clear outstanding balance highlighting, and month filters. Add error handling for invalid CSVs, duplicate invoice numbers, failed Google auth, and report generation failures.

Implement background jobs for PDF generation and Sheets sync, with retry logic and job status display. Add unit tests for amount calculations and integration tests for import, sync, and report generation flows.

Business Idea

I WANT TO UPLOAD A BILL FOR A CLIENT IT SHOULD BE UPLOADED WITH THE AMOUNT, WHETHER THEY PAID OR NOT, AT THE END OF THE MONTH. I NEED A PDF THAT SHOULD AUTOMATICALLY GENERATE A PDF WITH THOSE WHO PAID AND THOSE WHO DID NOT PAY WITH OUSTANDING AMOUNT WITH I NEED LINK WITH GOOGLE SHEET AS WELL AS PDF

Make My PRD

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