



A plumber in Sydney
OneBookPlus Plumbing
The home page: the name centred over the menu, a dark hero photo, a navy quote button and a grid of services.
Open the OneBookPlus Plumbing site(opens in a new tab)Built for Australian Marketing Agencies
Invoice the retainer on the 1st without thinking about it.
Scope-of-work proposals, recurring retainer invoicing, project + retainer pipeline, team time tracking and a top-client concentration view, built for AU agencies who'd rather grow than reconcile. All-in-one for $0 to $69/mo, replaces Accelo + HubSpot Sales + Harvest.
Free plan. No card required. · GST & ABN built-in · Retainers auto-invoice on the 1st · Sign up in 60 seconds





Cut $51+/mo from your software stack by replacing Accelo + HubSpot Sales + Calendly + Harvest with OneBookPlus.
See your savingsFree Tools & Resources
8-step founder guide, ABN, GST, PI, engagement letters, pricing, first 10 clients for consultants, agencies, and freelancers.
Operator GuideHourly vs fixed-fee vs retainer vs value-based, when each model wins, AU benchmarks, and how to phase fees.
ReferenceDrafting a tight SOW, deliverables, acceptance criteria, scope creep clauses, change-request workflow.
ReferencePI insurance for consultants, marketing agencies, and freelancers, typical $1–5M cover, premium ranges, run-off.
InteractiveInteractive, target salary, billable utilisation, overheads, GST + super, daily/hourly rate.
Key takeaways
5Everything for the agency
Retainers, projects, proposals, time, concentration risk and CRM, the operational layer you need, without the PSA-suite price tag or the bloat that comes with mid-market tools.
Monthly retainer + project work + media-spend pass-through on one branded invoice. Recurring schedule fires GST-compliant invoices automatically, set once, never miss a 1st-of-the-month send.
Build a proposal with deliverables, milestones, fees and terms. Client accepts on their phone, the project opens automatically, kickoff brief drops into the workspace, retainer schedule fires.
Active retainers, in-flight projects, pending proposals on one board. Budget, hours used, next milestone per engagement, drag to update, owner per lane, value rolled up.
Per-team-member timers logged to retainers and projects. Senior strategists, juniors and contractors all on different billable rates. Utilisation rollups show who's billable, who's slammed, who has capacity.
Every client with every proposal, project, retainer, invoice, note and email on one timeline. When a client account-manager hands over, the new lead picks up everything in one screen.
Dashboard surfaces top clients by month-revenue with a concentration-risk callout when one client crosses 40% of billings, so you spot dependency on a single account before they churn.
Free plan up to 5 active clients · No credit card · Cancel anytime
Website included
Every paid plan includes a full website, hosted by us, with nothing extra to buy and no separate builder: your site, its booking page and the tools behind them sit on one plan. The Free plan keeps the booking page and does not have the website.
The AI drafts every page from your own answers about your agency work, not from your business name, and it does not invent claims. Every page is laid out for a phone as well as a desk. In the Website Studio you edit any section in place, add text, lists and buttons inside it, choose how many cards sit across, and change the look, which keeps your words, your photos and the spacing you set. The booking page is built in and the site's Book buttons go to it. Your first AI build is included with the plan. A later rebuild runs on AI Companion credits, and one that starts fresh replaces your pages, saving a restore point in History first.
A prospect lands on your booking page at 9pm and books a chemistry call for Tuesday. The intake form captures their vertical, monthly budget range and current marketing stack, so you walk into the call already knowing whether it's a $4k or $15k/month conversation.
90-day brand sprint from $12,000. Monthly performance retainer from $4,500. A customer sees the price before they book.
The AI writes your services and the area you cover from your answers, so when someone searches 'marketing agency in [suburb]' there is a page that says what you do and where.
No card needed to start.

The Website Studio's Build with AI at its Plan step, on our plumbing demo: the pages, sections and menu the AI proposed from the answers already on the account, before anything is built. Click it to see it full size, or watch the recording of the build on the homepage.
Free
$0
A branded booking page on your OneBookPlus address. No website on this plan.
Starter
$29/mo
A website on your OneBookPlus address, hosted with SSL: 10 pages and a blog. The first AI draft is included.
Plus
$49/mo
Your own domain with SSL, 50 pages and a members area.
Growth
$69/mo
Unlimited pages, and a landing page per suburb from one template.
Your own domain connects on an active paid Plus or Growth subscription, not during the 14 day trial; a trial site lives on your OneBookPlus address. Every published site carries a small “Made with OneBookPlus” credit.
All three sites were drafted by the AI from the owner's answers, our own site included. It picks one of eight heading and body type pairings and how the cards sit (a fine line, a bold outline, a soft lift or no card), so a plumber's site, a driving school's and ours do not come out alike. Switch the view to see each one on a desktop, a tablet and a phone, click any screenshot to see it full size, or open the live site in a new tab. The plumber and the driving school are our demo businesses, not customers.




A plumber in Sydney
The home page: the name centred over the menu, a dark hero photo, a navy quote button and a grid of services.
Open the OneBookPlus Plumbing site(opens in a new tab)



A driving school in Donnybrook
The home page: a teal logo and name on the left, an L plates hero and lessons and packages as cards.
Open the OneBookPlus Driving School site(opens in a new tab)



Our own site, built the same way
The home page: a serif heading beside a framed photo on pale grey, and no full width hero at all.
Open the OneBookPlus site(opens in a new tab)See it in action
These are real product screens: scheduled retainer invoices, the project and retainer pipeline, the scope-of-work proposal accepted online, and the concentration-risk dashboard. Tap any screen to zoom in.
Monthly retainer + project work + media spend pass-through: all on one branded invoice. Recurring schedule fires GST-compliant invoices automatically.

Active retainers, in-flight projects, pending proposals: one board with budget, hours used and next milestone per engagement.

A quote with the total on top, subtotal and GST underneath, quantity, unit price and GST on every line, a valid-until date, and one button that sends it to the client.

Top clients by month-revenue with a concentration-risk callout when one account crosses 40% of billings, plus quote conversion, avg days-to-pay and the oldest-overdue marker. The metrics that matter when one client churn could swallow the quarter.

From chemistry call to paid
Four steps from chemistry call to invoiced retainer, designed around how AU marketing agencies actually deliver and bill.
New business books a discovery slot through your booking page. Intake form captures vertical, budget range and current marketing stack.
Build a proposal with deliverables, milestones, retainer amount and project fees. Client accepts on their phone: the engagement opens automatically.
Team timers log activity to retainers and projects. Pipeline shows where every engagement sits. Billable hours and outstanding balance per client roll up to the dashboard as work accumulates.
Monthly retainer fires automatically. Tick off the milestones you've delivered and bill them together in one action. Media-spend pass-through reconciles separately. All GST-compliant, all branded.
Most agencies send their first scope-of-work proposal within an hour of signup
Who it's for
From solo founder to 20-person shop. OneBookPlus scales without the mid-market PSA price tag.
Project-led work with occasional retainer. Scope-of-work proposals, milestone invoicing, designer + copywriter time tracking.
Retainer-heavy with media pass-through. Recurring monthly invoicing with fee revenue tagged separately from media spend so reports stay honest.
Deliverable-based retainers (articles/month, links/month). Production tracker, content delivery checklist, monthly invoicing.
Retainer + ad-hoc project work. Senior consultant time at one rate, account exec at another, full client engagement timeline.
Named tools, at each vendor’s own cheapest published plan, and ours underneath. Vendor pricing changes, so check each one before you decide.
Or use OneBookPlus
$29/mo
Everything in the list above, on one bill.
Start freeNo credit card · Free forever · Cancel anytime
Example walkthrough
An illustrative walkthrough of a typical agency billing day
It is the first of the month, so the retainer schedule fires on its own. Every client on a monthly retainer gets their invoice without you touching it, which means no missed sends and no apologetic email about forgetting to bill.
Mid-morning there is a chemistry call with a prospect who booked through your agency booking page. The intake form already captured their vertical, their budget range and the marketing stack they run today, so the call starts at the useful part. You scope a pilot project and a retainer, draft the proposal, and send it from your phone after the meeting.
At lunch you run the top-clients view. One account has crept up as a share of monthly billings and the concentration-risk callout flags it, which puts diversification on the partner-meeting agenda before an account churns rather than after. The quote conversion figure over the last ninety days sits next to it.
Later in the week the prospect signs, and the pilot project and retainer are set up from the accepted proposal. Outstanding invoices narrow to the slow payers, and automated reminders chase them for you. Average days-to-pay is tracked against your terms, so you can see whether the trend is moving the right way.
How we compare
How we compare to the tools agencies typically buy.
| Feature | OneBookPlus | Teamwork | Accelo | HubSpot Agency |
|---|---|---|---|---|
| Scope-of-work proposals | Yes | Yes | Yes | No |
| Recurring retainer invoicing | Yes | Yes | Yes | No |
| Project + retainer pipeline | Yes | Yes | Yes | Yes |
| Per-timekeeper billable rates | Yes | Yes | Yes | No |
| Top-client concentration view | Yes | No | No | No |
| Media pass-through line | Yes | No | No | No |
| Client CRM with timeline | Yes | Yes | Yes | Yes |
| AU GST + ABN built in | Yes | No | No | No |
| Free plan available | Yes | No | No | No |
| Price | From $0/mo | Subscription | Contact sales | Subscription |
100%
GST-compliant invoicing with your ABN
Auto
Retainer invoicing on schedule
1
Platform, proposals, retainers, projects, CRM
$0
Free plan to start, no card required
Agency savings calculator
Adjust the numbers below to match your real monthly spend. The total updates live, and so does what you'd save by replacing the lot with OneBookPlus.
Accounting (Xero, MYOB, QuickBooks)
Xero's cheapest published plan
Jobs & quotes (Accelo, Teamwork, Scoro)
ServiceM8's cheapest published plan
Website + hosting (Squarespace, Wix)
Squarespace's cheapest published plan, billed monthly
Bookings (Calendly, Acuity)
Calendly publishes US$10/mo. Type what you pay in Australian dollars.
CRM (HubSpot, Pipedrive)
HubSpot publishes US$20/mo. Type what you pay in Australian dollars.
Email marketing (Mailchimp, Klaviyo)
Mailchimp publishes no ongoing price. Type what you pay.
Rows open at the cheapest plan Xero, ServiceM8 and Squarespace publish, verified 2 August 2026. Calendly and HubSpot publish in US dollars and Mailchimp publishes no ongoing rate, so those three rows open at zero for you to fill in rather than carry a converted figure.
Your current stack
$90/mo
= $1,080/year
With OneBookPlus Starter
$29/mo
Replaces everything in the list. One bill.
Free plan available · No card required · Cancel anytime
An illustrated day, not real customer data. Scroll through it from morning to 5pm: the AI receptionist answers and books a missed call, the work runs from the app, the GST invoice is sent on the spot, payment lands and the books balance themselves, a review invite is queued for the next daily run, and the day closes with the ledger already written.
8:30am
While you're in a workshop
A SaaS founder needs a launch campaign. He rings the first agency on Google, yours, while you're mid-whiteboard with a client.
AI Receptionist
The AI answers in two rings, books a discovery call for 11:30 and emails the intake form, before your workshop wraps.
On the discovery call
The lead card has it all: vertical, budget range, current stack. You scope a 90-day pilot on the call itself.
Between meetings
He accepts by lunch. One tap turns the proposal into a GST invoice with a pay link, no spreadsheet, no late-night admin.
While you're on client work
The pilot deposit lands, the books update themselves, and $250.00 GST is set aside for BAS.
Reputation on autopilot
Two hours after payment the AI asks your newest client for a review, timed to the delay you set. No chasing, no awkward ask.
The day closes itself
You ran a workshop and signed a pilot. The book did the rest.
$0
collected
0
admin tasks done by AI
0
evenings lost
An illustrated day, not real customer data. AI Receptionist is a $79/mo add-on that needs AI Companion ($25/mo, included on Growth), and AI Companion is what sends the review invite as well. The rest of the day is the app itself.
Agency pricing
Start free, upgrade when the retainer book justifies it. No contracts, no setup fees, and no $50/seat tax for adding a junior to the timesheet. Cancel any time.
Free
$0/forever
Test a real retainer cycle before committing, no credit card.
Starter
$29/mo
Replaces Accelo + HubSpot Sales + Harvest for a small shop.
No card · Drops to Free if you don't upgrade
Plus
$49/mo
Outgrowing the basics, advanced reporting.
Our pick: unlimited contacts and booking pages for $49
Growth
$69/mo
For full shops juggling concentration risk, utilisation and media resell.
Add-ons, charged on top of any plan
Prices in AUD inc. GST. Online card payments carry Stripe processing fees (1.7% + 30¢ AU cards) plus a 2.5% OneBookPlus platform fee. See the full plan comparison
Already on another tool?
Most 5 to 10 person agencies move the commercial layer across on a clean 1st-of-the-month switchover. Export your clients and contacts as CSV from your current PSA, import them into OneBookPlus, and re-create your active retainers so the recurring schedule has a clean start date, the historical ledger stays in your old tool for audit.
Switch from
Built-in AI
You're in back-to-back meetings, new enquiries hit voicemail and go cold before you call back.
OneBookPlus
AI Receptionist · incoming call
“I need help with my BAS, can we book a call?”
If you don't answer, the AI books it, Consultation · Wed 11:00am, and texts a confirmation.
Extend Your Toolkit
Add Google Ads management, online booking, team rostering and more to round out the agency stack. Paid apps are charged on top of your plan.
Built in Melbourne, AU
ATO-ready from day one
TLS in transit, AES-256 at rest, tenant isolation at the database layer, read the security page
No credit card needed
Common questions about management software for AU marketing agencies.
You add media-spend as a line on the invoice, typically with a markup percentage your client has agreed to in the SOW (10% to 20% is industry-typical for managed-media services). Pass-through is tagged so you can separate fee revenue from media volume when you export to your accounting tool; full per-project P&L is on the roadmap.
Yes. Each retainer is per-client, set the monthly amount, included hours/deliverables, true-up policy and renewal terms in the proposal. The recurring invoice schedule is per-engagement, so a $4,000/month retainer client and a $12,000/month retainer client both run cleanly side by side.
Honest answer: no. OneBookPlus is the commercial layer of the agency, proposals, retainers, project pipeline-by-stage, time tracking, invoicing, client CRM. It doesn't replace Asana/ClickUp/Monday for task management or creative review-and-approval flows, and we don't pretend to. Most agencies keep their PM tool and use OneBookPlus for the money side. The pipeline view tracks engagement status (proposal, in-delivery, invoiced), not individual production tasks.
Teamwork and Accelo are mid-market agency suites with project-management depth and a price tag to match. HubSpot Agency Hub is a CRM layer on the marketing automation suite. OneBookPlus is the modern, lean alternative for small-to-mid agencies (1 to 20 people) who want proposals + retainers + project pipeline + invoicing in one tool, AU-first, from $29/month. We do not pretend to be a full PSA suite, we are the practice-side stack without the bloat.
OneBookPlus has Google Ads management as an installable app for agencies that resell media, at $99/mo on top of your plan. Direct Meta API integration is on the roadmap; today, most agencies report media spend manually as a line item on the monthly retainer invoice, which keeps the books cleaner anyway. Pass-through is tagged separately from fee revenue so your reporting stays honest when you export to Xero or MYOB.
Yes. Each client has a portal showing their outstanding invoices, deliverables in progress and project status. They can pay invoices online via Stripe (AUD, no conversion fees). It cuts the “where are we up to” emails substantially.
Yes. The Growth plan ($69/month) covers 10 logins, with extra logins at $9/mo each, and people you roster but who never sign in are free and unlimited. On top of that: role-based access (account managers see their clients only, partners see everything), per-team-member time tracking, per-timekeeper billable rates (senior strategist vs producer on the same project), and outstanding-receivables rollups. Above 20 people, you start needing dedicated PSA capability, talk to us about it.
Clients and contacts import from a CSV, every PSA exports them. Active retainers we recommend re-creating in OneBookPlus on a clean 1st-of-month switchover so the recurring schedule has a clean start date; the historical retainer ledger stays in your old tool for audit. In-flight projects can be either re-created (if the team prefers a fresh slate) or carried forward as engagements with start-date backdated. Stripe customer records migrate without forcing a re-card. Most 5 to 10 person agencies are operational within a fortnight; the trickiest piece is usually agreeing internally on what to leave behind versus carry forward.
About the author
Founder & CEO, OneBookPlus
Bishal spent a decade running digital projects for Australian small businesses before founding OneBookPlus. He writes and maintains these pages, and publishes what OneBookPlus does not do alongside what it does.
Read the founder bioHow this page was researched
The compliance and licensing statements above are taken from the bodies this page links to, including the AANA, the AASB and Ad Standards, so you can read the rule rather than take our word for it. Plan prices come from the OneBookPlus price registry, so the page and the checkout cannot disagree. Everything said about OneBookPlus describes what the product does today, and the page says so where it does not do something.
Marketing agencies make money two ways: a retainer that bills predictably every month, and project work that bills on milestones. Most agencies (sub-20 people) run this on an awkward stack, Teamwork or Accelo for projects (mid-market price tag), HubSpot for the CRM, Calendly for chemistry calls, Toggl for time, Xero for the actual invoicing. OneBookPlus collapses that into one platform with the AU-first details built in: GST on every line including media pass-through, ABN validated against the Australian Business Register, BAS-ready export, Stripe Pay Now in AUD.
The platform is designed around the agency operating model. Prospects book a chemistry call through your branded booking page, intake captures vertical, budget and current stack. You build a scope-of-work proposal with deliverables, milestones, retainer amount and project fees; the client signs electronically and the engagement opens with the kickoff brief attached. As your team works, timers log to retainers and projects per team member at their own billable rate, with the engagement rate as a fallback, senior strategist, account manager and producer all bill at their configured per-timekeeper rates. The retainer schedule fires monthly invoices automatically; delivered project milestones get billed together in one action when you say go; media pass-through reconciles as a separate line so your fee-revenue margin stays honest.
The dashboard surfaces top clients by month-revenue with a concentration-risk callout when one client crosses 40% of billings, or your top three exceed 75%, so dependency on a single account becomes visible before they churn. Quote-to-invoice conversion (90d) sits next to it, alongside time-tracked-today rolling from your team's timesheets. Per-engagement P&L is on the roadmap, not in today's dashboard; what's shipped is the leading indicators that matter for retainer-led agencies: concentration, conversion, billable hours, outstanding receivables.
Sign up for free, no credit card. Add your team, set per-role billable rates, define your service types (strategy, creative, paid media, content, SEO, PR, whichever fits the agency). Import your client list from a CSV or HubSpot export. Set up your booking page and drop the link in your new-business email signature. Most agencies are operational within an hour. The free plan supports up to five active clients with unlimited invoices, enough to test on a real retainer cycle before committing. Above five clients, the Starter or Growth plan covers the full agency.
Join Australian agencies that run their practice on OneBookPlus. Free to start, upgrade when you're ready.
Get started freeReviewed by Bishal Shrestha
Authoritative sources
Australian agencies bill under GST law, recognise retainer revenue under Australian accounting standards, and run media campaigns inside the ACCC's advertising rules. We cite the primary bodies for the claims on this page so you can verify directly.
From the blog
Practical guides and explainers from the OneBookPlus blog, grouped by topic.
One landscaping job followed from quote to money in the bank, with the customer, quote, job, invoice, payment and BAS all staying linked.
In the March quarter 2026, Australian small businesses waited an average of 24.1 days to be paid and were paid 6.9 days late (Xero Small Business Insights). This fully-sourced report aggregates the latest getting-paid, cash-flow, insolvency and payments-reform figures from Xero, the Payment Times Reporting Regulator, the RBA, ASBFEO, the ABS, CommBank-UNSW and CreditorWatch into one extractable resource.
Choosing plumbing software in Australia for 2026: which features matter on the tools, how the main options compare, and quoting to paid in one app.
The nine invoicing apps Australian small businesses actually shortlist in 2026, with cited pricing, GST and BAS notes, and which are genuinely free.
Features
Comparisons
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