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–$69/mo — replaces Accelo + HubSpot Sales + Harvest.





The average sub-10-person agency saves $100+/mo 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.
Open →Operator GuideHourly vs fixed-fee vs retainer vs value-based — when each model wins, AU benchmarks, and how to phase fees.
Open →ReferenceDrafting a tight SOW — deliverables, acceptance criteria, scope creep clauses, change-request workflow.
Open →ReferencePI insurance for consultants, marketing agencies, and freelancers — typical $1–5M cover, premium ranges, run-off.
Open →InteractiveInteractive — target salary, billable utilisation, overheads, GST + super, daily/hourly rate.
Open →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
Free Website Included
Stop paying $30–80/mo to Wix or Squarespace — and skip the $1,500–3,000 up-front for a designer. Every OneBookPlus agencie gets a branded booking page on the free plan. Want it on your own domain like a proper business website? $15/mo and we host it for you.
your-business.onebookplus.com.auoronebookplus.com.au/book/your-businessyourbusiness.com.au— custom branded domain, we host the siteA 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.
Brand color picker in settings. Logo upload. Trade licence number shown on every page so customers know you're legit.
90-day brand sprint from $12,000. Monthly performance retainer from $4,500. Customers see prices before booking — kills the price-shopping phone calls.
70%+ of agency searches happen on phones. Your booking page is built mobile-first; loads in under 2 seconds on 4G.
Already own yourbusiness.com.au? Add the Booking Website app ($15/mo) and point your domain at the booking page we host for you. We don't sell domains — keep yours wherever you registered it.
Schema.org markup for agency services + suburbs you cover. Google finds you for 'marketing agency in [suburb]' searches.
Agencies website cost — typical
Website builder
Wix, Squarespace or similar
Web hosting + SSL
Bundled in builders; separate if custom site
Designer (one-off)
Only if you want a custom-built site
Bookings on Calendly
Separate from your website
Typical recurring total
~$60–100/mo
+ $1,500–3,000 up-front if you hire a designer
With OneBookPlus
Your total
$0–15/mo
See it in action
Not mockups — these are the real product screens for your day-to-day.
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.

Build a proposal with deliverables, milestones and price. Client accepts on their phone — kickoff brief drops into the workspace automatically.

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. Project milestones invoice on completion. 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
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)
Monthly subscription
Jobs & quotes (Accelo, Teamwork, Scoro)
Per-user/mo for trade tools
Website + hosting (Wix, Squarespace)
Builder + hosting bundle
Bookings (Calendly, Acuity)
Separate online booking tool
CRM (HubSpot, Pipedrive)
Customer pipeline tracking
Email marketing (Mailchimp, Klaviyo)
Newsletter + campaigns
Your current stack
$176/mo
= $2,112/year
With OneBookPlus Starter
$29/mo
Replaces everything in the list. One bill.
Free plan available · No card required · Cancel anytime
Scroll through the day 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 five-star review is requested automatically, 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 for a review. Your newest client leaves five stars before day one.
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
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
Growth
$69/mo
For full shops juggling concentration risk, utilisation and media resell.
Prices in AUD inc. GST. Stripe processing fees apply to card payments (1.7% + 30¢ AU cards). Full plan comparison →
Already on another tool?
Most 5–10 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.
Built in Melbourne, AU
ATO-ready from day one
256-bit encryption
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 (10–20% 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/Accelo are mid-market agency suites with project-management depth and a price tag to match ($50–$300+/user/month). HubSpot Agency Hub is a CRM layer on the marketing automation suite. OneBookPlus is the modern, lean alternative for small-to-mid agencies (1–20 people) who want proposals + retainers + project pipeline + invoicing in one tool, AU-first, from $29/month. We don't pretend to be a full PSA suite — we're the practice-side stack without the bloat.
OneBookPlus has Google Ads management as an installable app for agencies that resell media. 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 unlimited team members, 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 5–10 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 has over a decade of experience in digital marketing, web development, and small business consulting across Australia. He has worked extensively with Australian marketing, creative and digital agencies — from solo founders to 20-person shops — on retainer billing, scope-of-work proposals, client concentration analysis and team utilisation.
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; project milestones invoice on completion; 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 FreeLast reviewed and updated: 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.
Comparisons
Tools & Apps
Free for solo agency founders
60-sec sign-up · No card · GST & BAS ready
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.
Stop overpaying
Most small businesses stitch together 4-6 tools that don't talk to each other. Here's what that typically costs.
Real-world scenario
How a 6-person Melbourne agency uses OneBookPlus on a retainer-billing Monday
Hannah opens her dashboard at 7:30am on the 1st of the month — retainer schedule fires at 8am, six clients getting their monthly invoice automatically. Total revenue dropping into the books today: $48,300 + GST. No manual work, no missed sends, no awkward 'oh sorry forgot to invoice you' email.
Mid-morning, a new prospect chemistry call — booked Friday through the agency's booking page. The intake form already captured vertical (B2B SaaS), monthly budget range ($15–25k), and current marketing stack. Hannah scopes a 90-day pilot project + 12-month retainer over the call, drafts the proposal in OneBookPlus by 11am, sends it from her phone after the meeting.
Lunchtime, she runs the top-clients view. One account has crept to 41% of monthly billings — concentration risk callout has flagged it. That triggers a conversation in the partner meeting about diversification before, not after, an account churns. Quote conversion is sitting at 38% over the last 90 days, healthy band for agency proposals.
Friday, the prospect signs. Pilot project + retainer fires automatically. Outstanding from last week is down to two slow payers — automated reminders chase them on Tuesday. Avg days-to-pay is 21, well under the 30-day AR target.
No spreadsheets, no missed invoicing days, $69/month for the full agency on the Growth plan — replaced four tools and a part-time bookkeeper's manual ticking off.
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 | $50+/user/mo | Contact sales | $45+/mo |