Best Invoicing Software for Consultants

Overview: best invoicing software for consultants

For the best invoicing software for consultants, Wave is the overall winner for a solo operator and the lowest-cost choice for a small team. FreshBooks is the runner-up, and the better fit when retainer invoicing, estimates and proposals are central to how you sell work. Xero is the specialist choice for a consultancy that needs broader accounting, not just a way to send bills.

This category is about more than generating an invoice. A consultant may need an upfront deposit, a recurring retainer, project visibility, or shared access for colleagues. The useful price is the price that survives that billing model. This guide compares Wave, FreshBooks and Xero on free plans, monthly cost, per-business versus per-user pricing, client limits and invoice caps. For the wider category, see the invoicing software hub.

How we chose

We started with the billing model rather than a long feature checklist. The key questions are whether a plan fits recurring work, whether colleagues add a charge, and whether the published limit is clients, invoices or bills. That makes the comparison useful for solo consultants as well as small agencies.

Every price and stated plan limit here was checked against the vendor's own pricing page on 2026-10-10, the date in the front matter. Monthly and annual offers are kept separate, and temporary promotions are not treated as the normal budget.

The central buying question is whether the software matches how your consultancy sells. A firm collecting deposits needs to map collection and later application. A retainer business needs to know whether the product explicitly includes client retainers, rather than assuming that a recurring invoice and a retainer are identical.

We also separated software cost from payment processing. Wave publishes card rates. FreshBooks and Xero support card and bank payments, but their pricing pages do not publish one comparable rate for every country, so check your local rate before comparing transaction costs.

Wave

Best value for small teams Wave Starter at $0, Pro at $19 per business monthly

Wave is the best starting point when the main requirement is sending invoices without a subscription. Starter costs $0 and includes unlimited estimates, invoices, bills and bookkeeping records. That is a strong fit for a solo consultant who wants fixed software cost at zero while the practice is small.

Wave is also unusually clear about team pricing. Pro is priced per business, not per user. Pro costs $19 per month, or $190 per year, and adds auto-import and auto-categorisation of bank transactions, unlimited receipt capture and automated late-payment reminders.

A named scenario makes the model clear: a five-person consultancy on Wave Pro pays $19 per month, not $19 multiplied by five. A solo consultant on Starter pays $0 for the plan, with card processing as the transaction cost. Wave lists 2.9% plus $0.60 per standard credit card transaction on Starter, 3.4% plus $0.60 for Amex, and 2.9% plus $0 for the first ten transactions each month on Pro before the fixed fee returns.

Wave's weakness is fit, not price. The verified pricing information does not establish a dedicated client-retainer feature or a specific deposit workflow. If you need to issue a deposit request, apply it to later work and repeat a retainer charge with particular accounting treatment, confirm that process before moving live billing.

Choose Wave when cost control and unlimited invoicing matter more than a named retainer feature. Its business-level price is particularly compelling for a team. If a client needs proposals and a recurring retainer process that your workflow cannot represent cleanly, look at FreshBooks next.

FreshBooks

Best for retainers and proposals FreshBooks Plus at $43 monthly, with client retainers

FreshBooks is the best fit of these three when retainer invoicing is the buying reason. Plus costs $43 per month and includes estimates, proposals and client retainers. That combination aligns with a consultancy selling ongoing access or a fixed monthly service.

The plan price is not the whole team bill. FreshBooks charges $11 per month for each additional team member. A four-person consultancy on Plus pays $76 per month, calculated as $43 plus three additional members at $11 each. A four-person consultancy on Premium pays $103 monthly, using the same member charge on top of the $70 plan.

FreshBooks also makes client volume a pricing decision. Lite costs $23 per month and covers 5 billable clients. Plus costs $43 and covers 50. Premium costs $70 and covers unlimited billable clients. Team members remain an extra $11 each on those published plan prices.

The limit counts active and archived clients. A past client continues to occupy a slot until you delete that client. Invoices remain accessible after deletion, but that housekeeping is worth planning for if your consultancy keeps a long history of engagements.

Premium is the plan to examine when unlimited billable clients, project profitability or custom email templates matter. A solo consultant with five or fewer billable clients may find Lite sufficient, while a retainer practice should compare Plus first.

FreshBooks has the clearest verified case for retainers, but deposit billing still needs a separate check. The pricing information confirms client retainers on Plus, not every possible deposit, credit or milestone workflow. Ask whether the exact deposit sequence you use is supported before treating FreshBooks as a complete answer.

Xero

Best for full accounting Xero Growing at $59 monthly, with no per-user licence fees

Xero suits consultancies that want invoicing inside a broader accounting system. It charges no per-user licence fees on any plan, so more colleagues do not automatically raise the subscription. The firm still needs a plan with enough invoice capacity.

Xero Early costs $27 per month and allows 20 invoices and 5 bills. It can work for a consultant who sends a handful of invoices each month, but a consultancy invoicing several clients weekly can reach that cap quickly. Growing costs $59 and includes unlimited invoices and quotes.

Established costs $97 and adds a 180-day cash flow forecast, multi-currency, project time and cost tracking, and employee expense and mileage claims. A five-person consultancy on Xero Growing pays $59 per month because there are no per-user licence fees. Moving to Established makes the plan cost $97, again without a separate user charge.

Xero's weakness is the entry-plan cap and the higher starting point than Wave Starter. The verified plan details do not establish a dedicated retainer or deposit feature either. Choose Xero when accounting breadth, unlimited invoices from Growing, multi-currency or project tracking is worth the subscription.

Priced comparison

Table: Published monthly pricing, limits and team-member charges

The table shows why a one-line cheapest ranking misleads. Wave Starter is the only $0 plan, while Wave Pro is the cheapest paid plan. FreshBooks Plus carries the most relevant named retainer capability, but a team adds member charges. Xero Early is cheaper than Growing, yet its invoice cap can make Growing the practical starting point.

The seat and billing traps

The first trap is confusing a business price with a seat price. Wave Pro costs $19 for the business rather than $19 for each person. Xero publishes no per-user licence fees. FreshBooks starts with a plan price, then adds $11 per month for each additional team member. For a four-person consultancy, that is $33 on top of the FreshBooks plan.

The second trap is choosing an annual discount without comparing commitment. Wave Pro is $19 monthly or $190 yearly. Xero currently advertises 80% off for the first three months for new US customers, and FreshBooks advertises a first-year promotion on Lite. These are temporary offers, so budget for the list price after the promotion.

The third trap is assuming that unlimited means the same thing everywhere. Wave publishes unlimited invoices and estimates on Starter and Pro. Xero publishes unlimited invoices and quotes on Growing. FreshBooks instead uses billable-client limits: 5 on Lite, 50 on Plus and unlimited on Premium. A practice can hit FreshBooks' client limit without hitting an invoice limit, while Xero Early can hit its invoice cap with few clients.

The fourth trap is the archived-client rule. FreshBooks counts active and archived clients toward its billable-client limit. Deleting a client frees a slot and leaves invoices accessible, but that maintenance step should be part of the decision, not a surprise after upgrading.

The fifth trap is treating payment processing as subscription pricing. Wave publishes 2.9% plus $0.60 for a standard credit card transaction on Starter, 3.4% plus $0.60 for Amex, and a Pro rate of 2.9% plus $0 for the first ten transactions before the fixed fee returns. FreshBooks and Xero do not publish one single comparable rate on the pages used here. Compare partner rates for your country.

Finally, separate retainer convenience from deposit certainty. A retainer may be a recurring agreement, while a deposit may be an upfront payment tracked against later work. FreshBooks Plus explicitly includes client retainers. This review does not verify a particular deposit feature for any of the three tools, so test the exact collection, application and client-communication sequence.

Retainers, deposits and recurring billing

Write down the billing sequence before selecting software. Is the client paying a recurring monthly amount, an upfront deposit, or both? What should appear on the invoice, how is payment applied, and what does the team review later? These questions turn “we need retainer invoicing” into a checkable requirement.

FreshBooks is the strongest match on the verified evidence because Plus names client retainers, estimates and proposals. The price still needs to include extra team members and the 50-client ceiling. Wave is sensible when a simpler process and per-business cost are the priority: a five-person team stays at $19 on Pro, and Starter covers a solo practice at $0.

Xero belongs on the shortlist when the recurring charge is part of a larger accounting workflow. Growing removes the Early invoice cap and keeps the no-per-user model, while Established adds multi-currency and project time and cost tracking. Its verified pricing does not name a retainer or deposit feature, so test the accounting fit directly.

For adjacent workflow decisions, see the guide to CRM for design studios and the comparison of AI meeting notes for consultancies. Those tools do not change the invoicing prices here, but they can clarify which system should own the client process.

Who should not buy

Do not buy a paid plan if you are a solo consultant who can use Wave Starter's unlimited invoices, estimates, bills and bookkeeping records and does not need paid additions. Card processing still has a published transaction cost, so free software does not mean free payment acceptance.

Do not choose FreshBooks Lite simply because $23 is below Plus. Lite's 5-client limit may be a poor fit when active and archived clients stay in the account. If retainers and proposals matter, compare Plus at $43; if unlimited billable clients matter, compare Premium at $70 plus team-member charges.

Do not choose Xero Early without counting invoices and bills first. The $27 plan allows 20 invoices and 5 bills. If your expected schedule exceeds either cap, compare Growing at $59 instead.

Do not pay for a broader accounting plan just to solve an unanswered deposit question. Confirm the exact deposit workflow, then compare plan cost, team members, client capacity and payment processing. Keeping the free tier while you validate the process may be the right answer.

Our verdict

Choose Wave Starter for a solo consultant avoiding a subscription, or Wave Pro when several people need one business account and unlimited invoicing at $19 matters more than a named retainer workflow.

Choose FreshBooks Plus when estimates, proposals and client retainers are the reason to buy. It is the runner-up overall because the workflow comes with a 50-client limit and $11 monthly charges for each additional team member. Choose Premium only when unlimited clients or its published additions justify $70 plus those charges.

Choose Xero Growing when the firm needs unlimited invoices, broader accounting and no per-user licence fees. Move to Established for its published additions. For every choice, verify deposit handling directly because the figures reviewed here do not establish a specific deposit feature.

Frequently asked questions