Run Both Sides of Your Business Money
Send invoices. Track vendor bills. See what is due. WilBill brings invoices, estimates, vendor bills, purchase orders, and inventory into one deterministic workspace.
Open Receivables ($24.8k) − Due Payables ($8.4k)
Most Invoicing Tools Only Do Half Your Job
You send invoices and chase customer payments. But what about the materials you purchased, the subcontractors you owe, and recurring software bills eating your profit margins? Traditional single-sided software leaves you blind to money going out of your business.
Single-Sided Blindspot
Tells you that you had a “great month” because you billed $40,000 — but has zero awareness of the $28,000 due to subcontractors and material suppliers next week.
Dual-Sided Financial Clarity
Synchronizes money coming in with money going out. Invoices, vendor bills, purchase orders, and stock adjustments sit in one coherent, deterministic ledger.
How WilBill Works in Practice
Send invoices. Track vendor bills. See what is due. A simple, 3-step loop that keeps money coming in and costs under control.
Select customer, add itemized line items, and attach your preferred offline payment instructions (ACH/Wire/UPI).
| Description | Qty | Rate | Amount |
|---|---|---|---|
| UI/UX Design Retainer — Mobile & Web | 1 | $8,650.00 | $8,650.00 |
Everything WilBill Does
One unified platform replacing separate tools for invoicing, accounts payable, proposals, time tracking, and inventory.
Invoice Clearly and Track What Is Paid
Send clean, multi-currency invoices, share customer-facing documents, and record full or partial manual payments against the balance without third-party gatekeeping.
Know What You Owe (Accounts Payable)
Track vendor bills and purchase orders alongside customer receivables. Due date alerts keep your cash flow predictable, taxes accounted for, and suppliers paid on time.
Proposals & E-Signatures with Audit Trails
Build multi-section estimates and scope agreements, capture legally binding e-signatures with timestamps and IP logs, and convert approved proposals straight into active invoices.
Integrated Project Time Tracking
Track unbilled hours against client projects and monthly retainers. Convert recorded hours into itemized invoice line items in a single click with accurate hourly rate calculations.
Persistent Client Portal Access
Provide your customers a dedicated, isolated portal to view open balances, access shared invoices, and download statements without granting access to internal operations.
Stock-Aware Inventory & PO Receiving
Inventory decrements atomically when invoices finalize and increments safely when vendor purchase orders are received, complete with low-stock warnings.
No AI Chatbot. No "Copilot." Just Tools That Work.
We made a deliberate product choice: WilBill has no conversational AI assistant reading your financial data or taking autonomous actions on your ledger. Everything in WilBill is deterministic, predictable, and fully under your direct control.
Calculations Never Hallucinate
Ledger arithmetic, tax percentages, and currency snapshots are computed with rigid algebraic rules. We never rely on probabilistic token predictions that can produce rounded or phantom sums.
Zero Third-Party Model Training
Your private client lists, invoice rates, and supplier contracts are never exported to OpenAI, Anthropic, or external model providers. Your data remains strictly isolated.
100% Explicit Human Intent
No autonomous agent will ever trigger payment requests, mark invoices as settled, or modify your ledger without your explicit click and confirmation.
Built for Businesses That Buy and Sell
Select your business model to see how WilBill streamlines your daily operations.
Send professional multi-currency invoices, provide clients a dedicated portal to view statements, and record manual payments without relying on messy email threads.
WilBill vs. Typical Invoicing Software
See why freelancers and growing teams switch from single-sided apps to a dual-sided ledger.
| Feature | Typical Invoicing Tool | WilBillComplete |
|---|---|---|
| Send professional invoices & estimates | Included | Included |
| Record manual offline payments (Bank/UPI/Cash) | Sometimes | Included |
| Track vendor bills (Accounts Payable) | No | Included |
| Purchase orders with inventory receiving | No | Included |
| Real-time stock tracking with low-stock alerts | No | Included |
| Client portal with isolated authentication | Rarely | Included |
| Proposals with legally binding e-signatures | Rarely | Included |
| Expense approval multi-step workflows | No | Included |
| Cash flow forecasting (AR + AP unified ledger) | No | Included |
| Conversational AI chatbot / assistant | Increasingly common | Deliberately excluded (100% Deterministic) |
Frequently Asked Questions
Everything you need to know about WilBill's dual-sided ledger, security, and setup.