The first invoice, made in Docs
Wrong tax, no place of supply, a number that will clash with the next one. It's fine until the customer's finance team sends it back.
IGST charged to a customer in your own state.
PikZiy Books / FOR STARTUPSFOR STARTUPS
Billing software for startups. From the first invoice to the board deck.
Send your first GST invoice today, see who owes you and what's due in over the next 13 weeks, record what you spend, and get books your CA can close. Built to start in minutes and grow with the team.
Sign-ups open November 2026 · 14-day free trial · No card needed to start
What is billing software for startups?
Billing software for startups puts the money side of a young company in order from the first customer: correct GST invoices, payments, expenses and the numbers that tell you how long the cash will last.
PikZiy Books starts with invoicing and grows into expenses, collections and double-entry books, without moving to another system.
WHERE STARTUP FINANCE BREAKS
Building the product. Guessing the numbers.
“How much runway do we have?”
An investor asks. The answer lives in three spreadsheets and the founder's bank app.
A board meeting spent rebuilding last month's numbers.
Customers who pay in 90 days
Enterprise customers pay late, and late customers eat runway faster than any expense.
₹2,97,360 owed to you while you pay salaries on the 1st.
FROM DAY ONE TO SERIES A
Start small. Grow without switching.
Screenshots of the real app with a sample business, Ember & Oak Studio in Pune.
- 01
Your first invoice, right
Add your GSTIN, a customer and what you sell, and the invoice works out CGST and SGST or IGST from both states. Customers pay from a private link, online or by UPI.
- Your own number series
- Saved items with HSN or SAC codes
- PAN only, until you register
- 02
Spend, recorded as you go
Record salaries, rent, cloud and software as expenses by category, with the monthly ones set to repeat, so the month is complete without chasing receipts.
- Repeating expenses
- Foreign currency for SaaS tools
- The month by category
- 03
Cash due in, week by week
The 13-week cash forecast shows money due in from invoices and promises to pay, against bills due out, so you see the tight weeks before they arrive.
- Overdue invoices first
- Promises to pay, kept or broken
- Ageing by customer
- 04
Books for the board and the CA
On Business, everything posts to double-entry books as you work: profit and loss, balance sheet, ledgers and TDS, ready for your CA and your investors.
- Trial balance and general ledger
- Bank reconciliation from a CSV
- Lock a month once it's filed
- 05
Bring the team in
Invite co-founders, the first ops hire and your CA, each with the access their job needs. Add people as you grow without changing plan.
- Admin, Accountant, Staff and Viewer
- Extra users as an add-on
- Activity log on Enterprise
FREE CALCULATOR
How long will the cash last?
Enter the cash in the bank, what goes out and comes in each month, and how fast each is growing. See your runway, when you break even, and the cash at the end of every month.
RUNWAY
11.1 months
You burn ₹2,70,000 a month today. At these rates you break even in month 17, but the cash runs out first.
Cash at the end of each month, from today. Revenue here is money collected, so late-paying customers shorten your runway; PikZiy Books' 13-week cash forecast shows what is actually due in. Nothing you type is saved.
Know the difference: cash flow vs profit and setting up your first finance system.
SPREADSHEETS OR SOFTWARE?
Why the founder's spreadsheet doesn't scale.
| Spreadsheets and Docs | PikZiy Books | |
|---|---|---|
| Invoices | Copied from the last one | Numbered, with GST worked out |
| Who owes you | Checked against the bank | Ageing and follow-ups |
| Cash due in | A forecast someone updates | 13 weeks, from real invoices |
| Expenses | Card statements at month-end | Recorded as you go, repeating |
| Profit and loss | Built by the CA after March | Current every day, on Business |
| Access | A shared file | Roles for every person |
WHAT YOU GET
Finance that grows with the company.
GST invoices and quotes
Correct from the first one.
Online payments
Your own gateway; no fee from us.
Dashboard
Owed, overdue, due this week, received this month.
Unlimited invoices
On every plan; plans differ by features and team.
Expenses and reports
Spending, sales, payments and tax.
Growth plan and aboveCollections and cash forecast
13 weeks of money due in and out.
Growth plan and aboveGST returns
GSTR-1, GSTR-3B and GSTR-2B tools.
Growth plan and aboveDouble-entry books
P&L, balance sheet, TDS and bank reconciliation.
Business plan and aboveSubscriptions
Recurring invoices for your customers.
Business plan and abovePurchases and bills
Orders, goods received and supplier bills.
Business plan and aboveActivity log
Who changed what, and when.
Enterprise plan and aboveImports and migration help
Customers and items from CSV, with our help.
Enterprise plan and abovePLANS
Which plan you need.
Start on Starter or Growth, and move up when the team and the books need it. Your data comes with you.
| Feature | Starter | Growth | Business | Enterprise |
|---|---|---|---|---|
| People who can sign in | 1 | 3 | 10 | 25 |
| GST invoices, quotes and payments | Included | Included | Included | Included |
| Expenses and reports | Not included | Included | Included | Included |
| Collections and 13-week cash forecast | Not included | Included | Included | Included |
| Double-entry books and TDS | Not included | Not included | Included | Included |
| Subscriptions for customers | Not included | Not included | Included | Included |
| Activity log and CSV imports | Not included | Not included | Not included | Included |
Every plan has unlimited invoices, customers and items, and starts with a 14-day free trial. Prices are published when sign-ups open in November 2026. Businesses that sign up from 1 November 2026 to 30 April 2027 and pay for a year get 18 months for the price of 12. Compare every feature
QUESTIONS
Asked, and answered.
What is billing software for startups?
Billing software for startups gets the first GST invoice out correctly, tracks who has paid, records what the company spends, and turns it into the numbers founders and investors ask for: revenue, what is owed, cash due in, and profit and loss. It should be quick to start and grow with the team.
How quickly can we send our first invoice?
Add your business details and GSTIN, a customer and what you sell, and the invoice is ready, with GST worked out from both states. Setup steps on the dashboard walk you through it; every plan starts with a 14-day free trial.
We aren't registered for GST yet. Can we still invoice?
Yes. Leave the GSTIN empty and add your PAN. Your invoices carry no GST until you register, and you add the GSTIN the day you do. Our guide to invoicing without GST registration explains the rules.
Can the whole founding team use it?
Yes. Growth includes 3 people and Business 10, with extra users available. Each person gets a role, from Admin to Viewer, and your CA can join as an Accountant.
What numbers can we show investors?
Revenue by period and by customer, what customers owe and how late it is, the 13-week cash forecast, expenses by category, and on Business the profit and loss and balance sheet from double-entry books. Download them as CSV on Business.
Does it help with cash flow?
On Growth and above, Collections shows overdue invoices with promises to pay and follow-ups, and a 13-week cash forecast of money due in from invoices and promises, against bills due out. See cash flow vs profit.
Can we bill subscriptions or retainers?
On Business, any invoice can become a subscription that invoices the customer every week, month, quarter or year, issued and emailed on its date. Customers pay each invoice from its link; cards are not charged automatically.
Will it keep our books for the CA?
On Business. From the start date you choose, invoices, payments, expenses and supplier bills post double-entry entries on their own, with TDS, bank reconciliation from a CSV statement and closed months.
Can we move from Excel or Tally?
Yes. Start fresh from a date, enter opening balances on Business, and on Enterprise import customers and items from a spreadsheet, with help moving your data in. See switching from Excel.
Which plan should a startup choose?
Starter if one founder is billing. Growth once a few people need access and you want expenses, reports, GST returns and collections. Business when you need books for your CA, recurring billing and purchases.
Build the product. Know the numbers.
PikZiy Books opens for sign-ups in November 2026. Join the waitlist and we will tell you the day you can start.
Join the waitlist