How to Choose Invoice Software: A 6-Step Evaluation Process

Choosing invoice software well takes about a week of part-time work and follows six steps: audit how you invoice today, eliminate tools on dealbreakers, weight and score the survivors, verify claims in the documentation, pilot with real invoices, and confirm you can leave with your records. This guide walks through each step with worksheets and worked examples you can copy.

If you want a short buyer's checklist and a 12-month price comparison of common tools instead, read the invoicing software overview. This page is the process behind that checklist: how to decide what matters for your business and how to test whether a tool really does it.

Step	What you do	Time	What you end up with
1. Audit	Count and classify your last 90 days of invoices	1 hour	A requirements sheet with real numbers
2. Dealbreakers	Write pass/fail rules from the audit	30 minutes	A shortlist of 2 to 4 tools
3. Score	Weight your remaining criteria and score each tool	1 hour	A ranked shortlist and a sensitivity check
4. Verify	Check each claim in help docs, pricing footnotes and terms	1 to 2 hours	A list of confirmed and unconfirmed claims
5. Pilot	Run real invoices and edge cases through the top one or two	1 to 2 weeks	Evidence from your own workflow
6. Exit check	Test export, numbering and what happens on cancellation	30 minutes	Confidence you are not locked in

Step 1: Audit the last 90 days of invoices

The fastest way to an accurate requirements list is to count what you actually billed. Open your sent invoices (or spreadsheet, or email folder) for the last three months and fill in this sheet. Ninety days catches monthly retainers three times and most quarterly patterns once.

Question	Why it matters	Example answer
How many invoices did you send?	Free-plan limits and per-invoice pricing	38
How many active clients?	Client caps on lower tiers	12
How many invoices were the same amount every month?	Whether recurring invoices are worth paying for	27 (9 retainers × 3 months)
How many tax rates appear on a single invoice?	Many tools allow only one	1
Did any invoice need your VAT/GST number or the client's?	Some tools store tax IDs but do not print them	Yes, 2 EU clients
Which currencies did you bill in?	Currency lists vary; FX conversion is rarer	USD, EUR
How did clients pay?	Card links, bank transfer, check	70% bank transfer, 30% card
How many invoices were paid in part?	Partial-payment tracking	4
How many needed a correction after sending?	Credit notes and edit rules	2
Who else touches invoices?	Seats and roles	One partner, one bookkeeper
What does your bookkeeper need from you?	Accounting integration versus an export	A monthly CSV

Worked example (hypothetical): a two-person design studio. The answers above describe it. Three things fall out immediately. Recurring invoices matter (27 of 38 invoices repeat). Card payment links matter less than they appear, because 70% of clients pay by bank transfer. And the two EU clients mean the studio must check how each tool shows a VAT number before looking at anything else.

Do this before opening a single vendor website. Once you have seen a polished feature page, it is hard not to start wanting features you have never needed.

Step 2: Turn the audit into dealbreakers

A dealbreaker is a requirement where "no" ends the evaluation, whatever else the tool does well. Write them as pass/fail rules with the reason next to each, and keep the list short: three to six rules. Anything that is merely annoying belongs in Step 3.

Dealbreakers usually come from five areas:

Tax presentation. Several tax rates on one invoice, tax-inclusive prices, per-line tax, or your tax ID printed on the PDF. A tool that cannot show the tax your clients need will force reissued invoices.
Mandated formats. Some countries now require structured electronic invoices between businesses rather than PDFs. Belgium's Federal Public Service Finance states that from 1 January 2026, Belgian businesses liable to VAT must use structured electronic invoices with each other (FPS Finance e-invoicing site). If a rule like this applies to you, a PDF-only tool fails at this step. See regional invoicing resources for more context.
Currencies. Check the actual list, and whether card payments work in each currency. Listing a currency on an invoice and charging a card in it are different features.
Bookkeeping connection. If your accountant insists on a live connection to QuickBooks Online or Xero, an export will not satisfy them. If a monthly CSV is fine, this is not a dealbreaker.
People and devices. Number of seats, role restrictions, and whether anyone must invoice from a phone without a browser.

Worked example, continued. The design studio writes four rules: (1) the PDF must show the studio's VAT number, either in a dedicated field or in notes; (2) recurring invoices must be available; (3) EUR and USD must both be supported; (4) at least three seats. It does not make a QuickBooks connection a dealbreaker, because its bookkeeper already works from a CSV.

Apply the rules to every candidate using the vendor's help documentation (Step 4 explains where to look). Most people go from eight or ten names to two to four here.

Step 3: Weight the remaining criteria and score each tool

Weighting forces you to admit what matters most. Give five or six criteria weights that add up to 100, score each shortlisted tool from 1 (poor) to 5 (excellent), multiply, add, and divide by 100.

Worked example: three hypothetical tools after the dealbreaker filter. The scores are the studio's own judgements from Steps 4 and 5; the tools are unnamed because the method is the point.

Criterion	Weight	Tool A	Tool B	Tool C
Time to create an invoice	25	4	3	5
Getting paid (links, reminders, statuses)	25	5	4	3
Recurring and follow-up automation	20	4	5	3
Bookkeeping hand-off	15	3	5	2
Annual cost	15	3	2	5
Weighted score	100	3.95	3.80	3.65

Tool A: (25×4 + 25×5 + 20×4 + 15×3 + 15×3) ÷ 100 = 395 ÷ 100 = 3.95. The others are calculated the same way.

Now run a sensitivity check: change the weight you are least sure about and see whether the winner changes. Suppose the bookkeeper says reconciliation time is the studio's biggest hidden cost, so bookkeeping hand-off rises to 30 and invoice creation speed drops to 10.

Weights changed	Tool A	Tool B	Tool C
Speed 10, bookkeeping 30 (others unchanged)	3.80	4.10	3.20

Tool B now wins: (10×3 + 25×4 + 20×5 + 30×5 + 15×2) ÷ 100 = 410 ÷ 100 = 4.10. If one plausible change in weights flips the result, the decision depends on that question, so settle it with the person who owns it (here, the bookkeeper) before you buy. If the winner holds across reasonable weights, you can decide with confidence.

For the annual cost row, compare total cost, not the subscription alone:

Annual cost = (monthly price × 12) + extra seats + card processing fees + any add-ons you need.

Card fees are usually the largest number. The invoicing software overview works this through with current list prices: on 144 card-paid $500 invoices a year, processing fees exceed $2,000 while the subscriptions in that comparison cost $0 to $516 a year. If most of your clients pay by bank transfer, as the studio's do, the subscription becomes the main variable again.

Step 4: Verify every claim in the documentation

Marketing pages summarise; help articles, pricing footnotes and terms of service tell you how a feature actually behaves. For each "yes" you scored in Step 3, find the help article that describes it. If you cannot find one, treat the claim as unconfirmed and ask support in writing.

What the feature page says	Where to check	What to look for
"Free plan"	Pricing page footnotes, plan comparison	Is the limit per month, per year or lifetime? Are reminders, sending and payment links included?
"Integrates with QuickBooks / Xero"	The integration's help article	One-way or two-way? Invoices only, or payments and clients too? Which plan?
"Accept card payments"	Payments help article and fee page	Whose merchant account receives the money? Fees, payout timing, which payment methods appear
"Automatic reminders"	Reminder settings article	Can you set the schedule? Is it on your plan? Can you turn it off per client?
"Recurring invoices"	Recurring invoices article	Draft for review or auto-send? Can you edit a schedule later? Are tax and discount carried over?
"Multi-currency"	Currency article	A list of currencies, or automatic conversion? Card charging in each currency?
"Tax support"	Tax article and a sample PDF	Number of rates per invoice, inclusive pricing, tax ID printed on the PDF
"Templates"	Template article	In-app invoice designs, or downloadable files you edit elsewhere?
"Secure" or "compliant"	Security page, then a written question	Ask which independent report covers it, for example a SOC 2 report from a CPA firm under the AICPA's SOC framework (AICPA SOC suite), and whether you can see it
"Export your data"	Export article	Format (CSV, PDF), and whether payments, balances and clients are included

Two habits make this step faster. First, search the vendor's help centre for "not supported" and "limitation" alongside the feature name; limitations are usually documented somewhere. Second, record the date you checked each page. Pricing and plan limits change, and your notes will tell you whether a later surprise was a change or a misreading.

Step 5: Pilot with real invoices and edge cases

A pilot should prove the tool on the invoices that cause you trouble, not just the easy ones. Use one to two weeks and your real clients, or clients you trust to receive a test. If a feature you scored highly sits on a paid plan with no trial, budget for one month of that plan; it costs far less than switching twice.

Run these cases and record pass or fail:

Test case	What it reveals	Pass if
Your most complex recent invoice	Line-item, tax and discount handling	The PDF matches your original to the cent
An invoice to a foreign client	Currency display and tax ID wording	Currency and VAT/GST wording are what the client's accountant expects
A client pays half	Partial-payment tracking	The balance shows correctly and a reminder (if any) asks for the remainder only
A mistake found after sending	Edit rules and credit notes	You can correct it without deleting history or reusing a number
A recurring invoice	Schedule behaviour	The next invoice is created as you expect (draft or sent), with the right amount
A card payment of a small amount	Payment flow and status update	Money reaches your account and the invoice is marked paid without manual entry
A bank transfer	Manual payment recording	You can record method, date and reference
Your bookkeeper's monthly hand-off	Export or integration	Your bookkeeper confirms the file or sync is usable

Time two or three ordinary invoices too. If a tool saves you nine minutes per invoice and you send 40 a month, that is six hours a month; put your own measured number into the annual cost from Step 3 rather than a vendor's estimate.

Step 6: Confirm you can leave with your records

Check the exit before you commit, while you still have leverage. You need three things: your invoice history in a usable format, a numbering sequence you can continue elsewhere, and access to past invoices after a downgrade.

Record-keeping is the reason this matters. In the US, the IRS says to keep records for 3 years in most cases, 6 years if you under-report income by more than 25% of the gross income on your return, and 7 years if you claim a bad debt deduction (IRS: How long should I keep records?, accessed October 2026). Other countries set their own periods, often longer. A tool you stop paying for in year two still has to give you the invoices you issued in year one.

Before signing up, confirm:

Export format and contents. A CSV with invoice number, date, client, amounts, tax and status, plus PDFs of each invoice. Check whether payments and balances are in the export or only in the app.
Numbering. Whether you can set the next invoice number, so a new tool continues your sequence without gaps or duplicates. The invoice number generator shows common formats.
Downgrade and cancellation. Whether invoices stay readable on a free tier, and how long data is kept after you close an account.

The invoice record-keeping guide covers what to keep and how to store it. This is general information, not legal or tax advice; check retention rules with your tax authority or adviser.

Which evaluation mistakes cost the most later?

Most regretted purchases trace back to one of these:

Buying the accounting suite for invoicing alone. Accounting software adds bank feeds, a ledger and reports. If your bookkeeper already keeps your books elsewhere, you pay for them twice. The accounting software page explains the difference.
Scoring features you will not use. Inventory, time tracking and project boards look valuable in a demo. If your audit shows no need, give them a weight of zero.
Ignoring the free-plan unit. "5 invoices" per month and "5 invoices" in total are very different plans.
Testing only the happy path. Partial payments, corrections and foreign clients are where tools differ most.
Trusting "integrates with" without the help article. An integration that pushes invoices one way may still leave payments to be entered by hand.
Skipping the bookkeeper. The person who reconciles your payments is the best judge of the hand-off criterion.

If you are deciding whether to move off a spreadsheet at all, read invoice software versus spreadsheets first.

How does InvoiceQuickly do on this process?

Here is InvoiceQuickly put through the same steps, so you can see where it passes and where it should be eliminated.

Likely dealbreaker failures. InvoiceQuickly supports one tax percentage and one discount percentage per invoice, with tax added on top of the discounted subtotal. It stores your tax ID and copies it to new invoice PDFs; add required supply dates and exemption wording in the notes or terms. It produces PDFs only, with no structured e-invoice formats. There is no two-way accounting sync: Pro offers a CSV export, and Business ($19/month) adds a reviewed, one-way export of selected invoices to QuickBooks Online or Xero. It is web only, with no mobile app, and it has no two-factor sign-in or SSO.

Where it tends to score well. You type or say what you did, and it drafts the client, line items, rates and terms into an editable invoice that you review before saving. Pro ($9/month) adds email delivery, Stripe or PayPal payment links on your own accounts (no added per-invoice fee; the provider's fees apply), scheduled reminders before and after the due date, recurring invoices as drafts or auto-sent, estimates, credit notes, a client portal, branding, CSV export and 5 seats. Partial payments can be recorded on every plan.

For the pilot. The Free plan covers 5 invoices, 5 clients and 3 AI drafts in total, with PDF download and payment recording. Email sending, payment links, reminders, recurring invoices, credit notes and CSV export need Pro, and there is no free trial of Pro, so a full pilot means one paid month. Only draft invoices can be edited; after sending, corrections go through a credit note. Invoices can be in USD, EUR, GBP, CAD, AUD, INR or PKR, with no automatic currency conversion.

The features page lists everything by plan, how it works shows the drafting flow, and the comparison hub has side-by-side pages for other tools.

Frequently asked questions

What should I look for in invoice software?

Look first for the things that would force you to reissue or retype invoices: how tax is shown, which currencies work, whether your country requires a structured e-invoice format, and how your bookkeeper will receive the data. After those pass, compare speed of creating an invoice, ways for clients to pay, and automatic follow-up.

How long should an invoice software trial last?

One to two weeks is enough if you run a script of real cases: your most complex invoice, a partial payment, a correction after sending, a recurring invoice, a small card payment and your bookkeeper's hand-off. A longer trial without a script rarely tells you more.

Is free invoice software good enough?

It can be, if your audit fits inside the free limits. Check whether the limit counts per month, per year or over the life of the account, and whether reminders, email sending and online payment are included. A free plan that lacks the feature you weighted highest is not really free for you.

Should I use my accounting software's invoicing instead?

If your books already live in accounting software and its invoicing passes your dealbreakers, yes: one system means no hand-off. A separate invoicing tool makes sense when it scores clearly better on the criteria you weighted highest and your bookkeeper accepts the export or integration it offers.

How do I switch invoice software without losing records?

Export invoices as CSV and PDF from the old tool, keep the old account readable until outstanding invoices are paid, set the new tool's next invoice number to continue your sequence, and recreate recurring schedules before their next date. Confirm with your tax adviser how long you must keep the old records.

What security questions should I ask an invoicing vendor?

Ask where card payments are processed and whether the vendor ever sees card numbers, whether two-factor sign-in is available, which independent report (such as a SOC 2 report) covers their controls and whether you can read it, and how you can export or delete your data. Prefer written answers to adjectives like "bank-level".