Quotes & Invoicing System — Closed Loop From Lead to Cash
A custom quotes and invoicing system that unifies CPQ configuration, versioning, e-signature acceptance and automatic proforma-to-invoice generation in a single quote-to-cash flow. No double entry, no lost leads, no accountant queue.
What the quotes and invoicing system includes
More than billing software with a PDF button — a full quote-to-invoice tool with multi-currency, e-signature and clean exports to your accounting stack.
Quote templates and versions
Templates by service or product, with a product catalogue and price matrices. Each new quote version keeps history of edits, prices and approvals.
Pre-send approvals
Multi-step approval by amount, discount or customer — reps prepare, managers approve, margin stays protected.
Email tracking — has the client seen it?
Know when the client opened the quote, how many times and which pages got the most attention. Automated reminders on days 3, 7 and 14.
Online acceptance with signature
The client opens a link, reviews the quote and signs with drawn signature or qualified e-signature in the browser — timestamped and audit-ready.
Automatic proforma to invoice
Accepted quotes generate a proforma; on payment it converts to a tax invoice with the correct numbering. No manual line copying, no VAT mistakes.
Multi-currency and accounting export
EUR, BGN, USD, GBP with daily central-bank rates. Export to popular accounting software via CSV, XML or direct sync — accountants get ready records, not scanned PDFs.
Who this quotes and invoicing system is for
Quote-to-cash software for three business types where the quote carries the margin and slow invoicing eats cash flow.
Agencies and services
Marketing agencies, law firms, consultants and architects send 30–80 quotes per month with varying scope. The system keeps templates by engagement type and auto-generates monthly retainer invoices — no spreadsheets, no missed periods.
Installation businesses
HVAC, windows, plumbing, solar and security companies quote materials plus labour with several options. The CPQ configurator prices on the spot, applies catalogue discounts and ships a line-item quote ready for signature.
B2B sales teams
SaaS and B2B sales with long cycles and multiple stakeholders. Quote versions, conditional discounts and DocuSign-style acceptance from the portal — no PDFs over email, no double entry into the CRM.
How we build the quote-to-cash system
Owned code, no vendor lock-in. The default stack is proven across EU deployments with e-signature and accounting integrations.
Technology stack
Frontend: Next.js 15 — fast UI for sales reps with server-rendered PDF preview and public acceptance links.
Database: PostgreSQL with full audit trail on every quote and invoice change — defensible for tax audits.
PDF generation: HTML-to-PDF via headless Chromium — pixel-perfect documents with brand identity and digital seal.
Webhook layer: on quote signed or invoice paid — push to accounting software, CRM and Slack or Telegram for finance.
Payments and accounting
Stripe / ePay / Borica: pay-by-card link directly from the invoice, automatic paid status update.
Bank payment matcher: import bank statements and auto-reconcile by amount, IBAN and reference.
Accounting export: XML, CSV or scheduled direct sync to your accountant's ledger system.
Qualified e-signature: eIDAS-compliant providers — legally valid quote acceptance by the client.
Why Saitami for quotes and invoicing
Three numbers from real quote-to-cash deployments — measured, not marketing claims.
Signed quotes
Quick send, email tracking and automated reminders on days 3, 7 and 14 bring the client back before they forget.
Time from acceptance to invoice
Automatic proforma and invoice generation saves around two working days per deal and eliminates numbering errors.
Starting investment
Fixed-price MVP — templates, versions, online acceptance, proforma to invoice, one accounting export. Production-ready in four weeks.
Frequently Asked Questions
How is a quotes system different from plain invoicing software?
Invoicing software starts after the deal is won — you enter customer, items, VAT and print. A quotes and invoicing system covers the full quote-to-cash cycle: CPQ configurator, versioning, approvals, open tracking, online acceptance with e-signature and only then automatic proforma and invoice. One source of truth, zero double entry across tools.
Can clients sign online — drawn signature or qualified e-signature?
Both. Drawn signature with mouse or touch is valid for most B2B deals and works in any browser. For regulated sectors — energy, healthcare, public procurement — we integrate qualified e-signature (eIDAS QES) through certified providers. Signed documents are sealed with timestamp, IP and cryptographic hash, legally valid across the EU.
Does it sync automatically to accounting software?
Yes. We support the standard Bulgarian and EU accounting tools through XML, CSV or direct API sync. Once an invoice is issued a webhook pushes the record to the accountant or runs on schedule — hourly, daily, weekly. Accountants receive ready entries with correct GL accounts and analytics, not scanned PDFs they have to retype.
How much does a quotes and invoicing system cost?
From €3,200 one-off — quote templates, versioning, online drawn-signature acceptance, automatic proforma and invoice, one accounting export. Production-ready in four weeks. A full quote-to-cash platform with CPQ, qualified e-signature, Stripe or ePay and payment matcher runs €6,500–€12,000. No per-user fees, no lock-in.
Ready to close the quote-to-cash loop?
A free 30-minute call — we review your lead-to-paid process, find the time leaks and propose scope, timeline and fixed price. No slides, no obligation. Related pages: Client portal for orders and invoices, Reservations and scheduling, software development and API integrations.
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