Timesheet Software for Agencies: Budgets, Billable Hours and AI

Choose by the budget feature you will actually use. Harvest suits budgets in hours or fees with email alerts and invoicing; Toggl Track Starter has estimates and alerts from $9 a seat; Clockify gives budgets and alerts only from its Pro plan; Productive suits agencies wanting planning, budgets and AI in one product. Trial one live project first.

The timer is rarely the deciding feature. What decides it is what happens when a project reaches 80% of its hours: who is told, how soon, and whether the billable and non-billable split in the report matches what you put on invoices. The four tools differ most on exactly those points.

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I compared the four on their own pricing and help pages in November 2026 and trialled none of them. Prices are USD list prices per seat per month before tax. Where a page shows one figure for monthly billing and another for yearly billing, I give both.

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Two of the four name AI features on those pages: Toggl, which answers questions about your time data, and Productive, with an assistant, timesheet auto-fill and report generation. Harvest and Clockify name none. For those two, and as a second opinion on any tool, a weekly export and a chat assistant can run the budget check shown further down.

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Decide by the question you need answered

Four questions cover most small-agency needs, and each points to a different cheapest route.

1. Which projects are about to exceed their hours? You need estimates plus alerts. The lowest paid entry points are Toggl Track Starter ($9 or $12), Harvest Teams ($9 or $11) and Clockify Pro ($7.99 or $9.99), yearly or monthly billing.
2. Which clients make money after salaries? You need cost rates and a profitability report: Harvest Enterprise ($14 or $17.50), Toggl Track Premium ($16 or $24) or Clockify Pro, which lists a labour cost and profit report.
3. What can we invoice from these hours? Harvest lists invoicing on every plan, Free included, and Clockify adds invoicing from Standard. Toggl's own invoicing page describes invoice-ready billable reports exported as CSV or PDF rather than invoices it sends, so it pairs with your accounting tool.
4. Can the tool hold our retainers? A retainer needs a budget that resets each month. Harvest offers a monthly reset on its budgets, Toggl Track describes recurring projects with budgets and rollover of unused or overrun hours, and Productive lists recurring budgets from Professional.

Four tools, plan by plan

Seat prices are shown as yearly billing first, then monthly, where the page gives both.

Two cautions from reading these pages. First, Harvest's seat price covers core features, and its pricing page says additional invoices, projects, clients and tasks are billed by usage as a team grows, so ask for a worked quote at your project count. Second, Productive's pricing page contradicts itself between its monthly and yearly views, and its "10 users" totals ($90 a month on Essential, $240 on Professional) are not ten times the per-seat figures, so get a written quote before comparing it with the other three.

How each tool's budget alert behaves

Alerts are where the tools differ most, so here is what the help pages say, one tool at a time.

Harvest

You type any threshold percentage in the project's edit form, next to the box labelled "Send email alerts if project exceeds X% of budget". The email goes out the morning after the project passes it, then repeats weekly until the project is archived, the alert is switched off or the budget changes; monthly budgets alert once a month. Budgets can be total project hours, hours per task, hours per person, total project fees or fees per task. A separate setting warns people inside the time-entry window when an entry takes a project over budget, on the web only and not in the mobile apps.

Toggl Track

Alerts are a Starter-plan feature, created by admins only, from a fixed list of thresholds: 50%, 75%, 80%, 90%, 100% or 150%. You can add as many rules as you like, for all projects or a specific one, and send them to the workspace admin, the project manager, project members, user groups or named people. A time-estimate alert works on any paid plan; an alert on a fixed fee needs Premium. Alerts cannot target one specific task, and new ones can take up to 30 minutes to start working.

Clockify

Alerts need Pro or Enterprise and are set up by owners and admins. They email people when a project reaches a percentage of its estimated time or expenses. They go out at the 30-minute mark of each hour, only to people on the project's access list, and never to users with an unverified email address. If you exclude non-billable time from an estimate, the alerts count only billable hours.

Productive

The pricing page lists "budget spent warnings" as a custom reminder for managing budget spending but names no plan for it, and it does not say how thresholds or recipients work. Ask for that in the demo, and ask to watch one fire on a test budget before you commit.

What the AI features add and leave out

Toggl's page describes questions in plain language, such as which projects went over estimate last month, answered from your time data with charts and CSV exports, and says Toggl AI can create projects and tasks or log time from a sentence you type, while a separate AI Task Creator turns notes or briefs into structured tasks. Toggl AI runs on any paid plan, and an admin can switch AI features off for the whole organisation. It also describes connecting Toggl to AI assistants such as Claude through an MCP server, a standard way for an assistant to read a tool's data.

Productive's page lists an assistant, AI time tracking that auto-fills timesheets from calendar events and past entries, report generation for budgets, resources and projects, and project summaries that mention budget blockers. Agents and connectors sit on the Ultimate plan. Harvest and Clockify name no AI feature on the pages I read.

All of it depends on the entries underneath. An auto-filled timesheet that books a cancelled client meeting reaches an invoice if nobody reviews it, so keep a human check between suggestion and billing. AI time tracking for small teams covers the approaches that capture hours without asking people to fill in a sheet.

One fixed-fee project, watched as it burns

Say a marketing agency of eight people sells a website rebuild for a fixed $12,000. The team budgets 120 hours, an implied $100 an hour, at an internal cost of $45 an hour, so the planned margin is $12,000 minus (120 × $45) = $6,600, or 55%. The project manager logs hours in the tool and, once a week, writes down her honest percentage complete. Every figure is an illustration.

Forecast hours are hours used divided by percentage complete, the effective rate is $12,000 divided by forecast hours, and the margin takes forecast hours at $45 from the fee. The alert fires in week 6 with 24 hours of budget left and, by the manager's own estimate, 45% of the work still to do. It is useful, but the table shows the trouble was visible in week 3: at 40% of the budget and 35% complete, the forecast was already 137 hours. An hours-only alert fires late on a project that started behind, so pair it with a weekly percentage-complete note from whoever runs the project. Toggl Track's Premium project dashboards describe a finish forecast; elsewhere you calculate it as the table does.

At the week-6 alert there are three ways out:

• Cut scope. Removing two landing-page templates the manager sizes at 24 hours drops the forecast to about 150.5 hours, an effective rate of $79.71 and a margin of 43.5%.
• Raise a change order. If the client pays for 30 extra hours at $100, revenue becomes $15,000 against the same forecast cost of about $7,855, a margin of 47.6%. The web design change order template shows the wording.
• Do nothing. The week-8 row: 185 hours, $65 an hour and a 30.8% margin.

A burn-alert policy to copy

An alert nobody acts on is noise. This filled-in version assumes a fixed-fee project; adapt the owners to your team.

Toggl Track's fixed list covers every row and lets you add several rules per project. Harvest's edit form has a single alert box, so choose 80% there and read the other thresholds from the budget used and remaining figures Harvest shows on each project. For a retainer, the same policy runs on the monthly budget: with 40 hours a month and a Harvest budget that resets monthly, 80% is 32 hours, and the useful question is whether that happens in week two or week four.

Billable-hour reports: three numbers to read monthly

The tool supplies the hours; you do three divisions. Utilisation is billable hours over available hours. Realisation is the value you invoiced over the value of the same hours at standard rates. The effective hourly rate by client is the fee over the hours it took.

A quick sum for an illustrative team of five billable people. Available time is 5 × 140 = 700 hours and 455 are logged as billable, so utilisation is 65%. At a standard rate of $95, those hours are worth $43,225; the month's invoices came to $38,900, so realisation is 90.0% and $4,325 was written off or discounted. Then look at one retainer: $3,600 for 44 hours is $81.82 an hour against the $95 standard, which is the number to take into the renewal conversation.

Where each tool gets you: Harvest has billable and cost rates for teams from Teams and profitability reporting on Enterprise; Toggl Track has billable rates from Starter and profitability reports on Premium; Clockify has billable rates from Basic and a labour cost and profit report on Pro. If you only need the first two divisions, any of them works on a modest plan. Agency utilisation with AI goes further on targets and overload, and the WIP report template covers hours worked but not yet invoiced.

A weekly budget digest from an export

Export the week's entries and each project's budget into one sheet. Swap client names for project codes first, because time-entry notes often carry client detail you may not want in a chat tool, and use an assistant on a business plan whose data terms you have accepted.

You are preparing a Monday budget digest for a small agency.
Columns: project_code, type (fixed or retainer), budget_hours,
hours_used, pm_percent_complete (0 to 1), days_left.

For each project:
1. share_used = hours_used / budget_hours.
2. For fixed projects: forecast_hours = hours_used / pm_percent_complete.
3. Flag AMBER if share_used >= 0.8, or forecast_hours > 1.15 * budget_hours.
   Flag RED if forecast_hours > 1.3 * budget_hours.
4. For retainers, flag AMBER if share_used >= 0.8 and days_left > 8.

Show the arithmetic for every flagged row. Do not guess missing values:
list any project with a blank or zero pm_percent_complete separately.
End with the two projects I should call about first, one sentence each.

[paste the sheet here]

An illustrative result:

Three fixes make the digest dependable. Ask for one decimal place and no adjectives, because a first attempt may call 82.5% "nearly exhausted". Keep the blank-field rule, since otherwise a missing percentage can be read as zero and produce an absurd forecast. And recompute each flagged row in the sheet with =hours_used/pm_percent_complete, so the assistant's arithmetic never reaches a client conversation unchecked. Five minutes on Monday morning replaces a dashboard nobody opens, and the same digest works whichever tool the export came from.

Setup mistakes that distort budgets

Each of these comes from a help page, and each shows up as a number that looks plausible and is wrong.

• Blank is not zero in Harvest. On per-person or per-task budgets, a blank field means that person's or task's hours do not count against the budget, while 0 marks them over budget at the first tracked minute. A realistic version: budgets entered only for senior staff, so a project sits at 40% for a month while the juniors' hours go uncounted.
• Non-billable time counting by default. Harvest counts both billable and non-billable hours against a total-project-hours budget unless you change a preference, so internal catch-ups can trip the 80% alert early. Clockify lets you exclude non-billable time from an estimate, after which its alerts count only billable hours. Pick one rule and apply it to every project.
• Editing a budget rewrites history. Harvest's help page says there is no way to change a budget, recurring or not, without affecting all historical budget data. If a retainer's hours change in July, duplicate the project rather than editing the old one.
• Nobody receives the alert. Harvest members get budget emails only when they are on the project, the budget is in hours and the project report is shown to everyone. Clockify sends only to the project's access list and never to unverified emails. Toggl Track lets only admins create alerts. Fire one on a dummy project and see who gets it.
• Expecting real time. Harvest emails the morning after, Clockify sends at the half hour, and a new Toggl Track alert can take up to 30 minutes to start. An 80% alert is a nudge, not a stop sign.

A trial script: six tests before you pay

1. Create a fixed-fee project with a 20-hour budget and an alert at 80%. Log 16 hours across two test users, then note how long the alert takes and who receives it.
2. Add a non-billable entry and see whether it counts against the budget. Change the setting and watch the figure move.
3. Run last month's billable-hours report by client, then by person, and compare it with the invoices you sent. If the two disagree, that gap is your realisation problem, not the tool's.
4. Set a monthly retainer budget, log time either side of a month end and confirm it resets.
5. Export time entries to CSV and check it carries project code, person, billable flag, rate and note, the columns the digest prompt needs. Check what any AI feature does with the notes field.
6. Ask each vendor to quote your headcount and project count in writing, usage charges included. For a first look at invoicing from the same hours, timesheet to client invoice for agencies shows the hand-off, and tracking profit per project covers what to do with the result.

Questions agencies ask when choosing timesheet software

Do I need a separate tool for project budgets?

Not for hours budgets. All four tools here track estimates against logged time. A separate project-management or planning tool earns its place when you need resource planning across people and weeks, which Productive bundles and Harvest offers as a companion product, Harvest Forecast. Start with the cheapest plan that fires a budget alert.

Should non-billable time count against a project budget?

Decide once and apply it to every project. Counting it shows true effort but trips alerts early on internal catch-ups. Excluding it matches the client's invoice. Harvest counts both by default and has a preference to count billable only; Clockify can exclude non-billable time from an estimate.

Can AI fill in timesheets for my team?

Productive lists AI time tracking that auto-fills timesheets from calendar events and past entries, and Toggl AI can log time from a sentence you type. Treat the output as a draft: a cancelled meeting or a shared call booked to the wrong client reaches an invoice if nobody reviews it.

How many people should log time in a small agency?

Everyone who works on client projects, including the owner and account managers, because their hours are part of a project's real cost. Seats are cheap next to the hours at stake: ten seats at $9 cost $90 a month, the value of one hour billed at $90.

Is a free plan enough for a small agency?

Rarely. Harvest's free plan allows one seat and two projects, and Toggl's and Clockify's free plans cap users. Budgets and alerts in Clockify start on Pro and in Toggl on Starter. Use free plans for the trial, not for a team that bills clients.

Further reads

• Marketing Agency Pricing After AI: Retainers, Packages and Deliverables — Pricing retainers so the budget alerts mean something.
• AI Tools for Agencies: What a Five-Person Team Pays Each Month — What a five-person team pays across its AI tools.
• Should You Charge Clients Less When AI Speeds Up Your Work? — What faster work does to hourly billing.
• AI for Advertising Agencies: Media Plans and Weekly Budget Checks — A media-plan template, a weekly pacing calculation and a clear human gate before budget edits.
• AI Tools and AI Development: The Complete 2026 Guide — the AI hub, including every tutorial in the AI-for-business series.

Sources: Harvest pricing, features and help-centre pages; Toggl pricing and support pages; Clockify pricing and help pages; Productive pricing page, all read in November 2026.