Series A Fundraising Checklist: What SaaS Founders Need Before They Raise

What Investors Expect at Series A in 2026

The bar for Series A fundraising has risen significantly since 2021. The days of raising a Series A on a compelling pitch and £300K in ARR are largely over. In 2026, most UK SaaS companies raising a Series A need £1M to £2M in ARR, clear product-market fit, a repeatable sales motion, and a credible path to £10M ARR within three to four years.

This checklist covers everything you need to prepare before entering Series A conversations. Getting this right before your first investor meeting dramatically increases your chances of closing and reduces the time from first meeting to term sheet.

The Metrics That Matter for Series A

Investors evaluate Series A companies through a specific lens. They want to see that you have found product-market fit and are ready to scale. The metrics that prove this are well defined.

ARR of £1M to £2M: This is the most common threshold. Some investors will look at companies slightly below £1M if growth is exceptional, but the majority want to see at least seven figures of recurring revenue demonstrating real market traction.

Year-over-year growth of 100 percent or more: At the Series A stage, investors expect rapid growth. Doubling revenue year-over-year is the baseline expectation. Companies growing 150 to 200 percent are in the strongest position to attract top-tier VCs and command premium valuation multiples.

Gross margin above 70 percent: This confirms you are building a software business with scalable economics. If your gross margin is below 70 percent, identify why and have a clear plan for improvement. Common drags include heavy implementation services, expensive infrastructure, or below-market pricing.

Net revenue retention above 100 percent: NRR above 100 percent shows that your existing customers are expanding, which means your product delivers increasing value over time. NRR above 110 percent is strong. Above 120 percent is exceptional and dramatically strengthens your fundraising narrative.

Monthly churn below 3 percent: For B2B SaaS targeting SMB and mid-market, monthly logo churn below 3 percent demonstrates adequate product-market fit. Below 2 percent is strong. Enterprise-focused companies should be well below 1 percent.

LTV:CAC ratio above 3:1: This proves your unit economics work — that you can acquire customers profitably and that each customer generates significantly more value than the cost to acquire them.

CAC payback under 18 months: Investors want to see that you recover your acquisition cost within a reasonable timeframe, proving the business can fund its own growth as it scales.

Financial Documents You Need Ready

Before your first investor meeting, prepare these financial documents. Having them ready signals professionalism and accelerates the process when investors move to diligence.

Three-statement financial model: A driver-based financial model with integrated P&L, balance sheet, and cash flow projections for three to five years. Include base, conservative, and optimistic scenarios. Every assumption should be defensible and traceable to operational inputs.

Monthly management accounts: At least twelve months of monthly P&L with actual versus budget variance analysis. Investors will scrutinise the consistency and quality of your financial reporting. If your management accounts are messy, it signals that the finance function is immature.

MRR schedule: A monthly breakdown of MRR by component — new, expansion, contraction, and churn — for at least twelve months. This is how investors verify your growth story and understand the dynamics of your revenue.

Cohort analysis: Revenue retention by monthly or quarterly cohort showing how each group of customers behaves over time. This reveals whether retention is improving, stable, or declining — a critical signal for investors.

Cap table: A clean, current capitalisation table showing all shareholders, option pools, convertible instruments, and their terms. Messy cap tables slow down deals and create legal costs.

Cash runway analysis: A clear view of current cash, monthly burn, and projected runway under multiple scenarios. Investors want to understand your urgency and how much time you have to close the round.

Building the Data Room

The data room is where investors conduct due diligence after issuing a term sheet. Having it ready before you start fundraising saves weeks and signals that you are a well-run company.

Your data room should include corporate documents such as articles of association, shareholder agreements, and board minutes. Financial documents including audited or reviewed accounts, management accounts, and your financial model. Commercial documents including customer contracts, pricing documentation, and pipeline data. Legal documents including IP assignments, employment contracts, and any outstanding litigation or disputes. Tax documents including corporation tax returns, R&D tax credit claims, and VAT returns.

Organise the data room logically with clear folder structures and naming conventions. A messy data room creates a negative impression and slows the process. Many founders use platforms like Dropbox, Google Drive, or dedicated virtual data rooms like Datasite or Ansarada.

The Pitch Deck

Your Series A pitch deck should be 15 to 20 slides covering the problem, solution, market size, product, traction and metrics, business model, go-to-market strategy, competitive landscape, team, financial plan, and the ask.

The two sections where most SaaS founders underperform are the traction and financial plan slides. Your traction slide should show MRR or ARR growth chart, key SaaS metrics including NRR, LTV:CAC, and gross margin, customer logos or count by segment, and cohort retention data.

Your financial plan slide should show a three-year revenue projection with the key drivers visible, path to profitability or next fundraise milestone, use of funds breakdown showing how you will deploy the capital, and the key milestones this round will fund you to achieve.

Use of Funds: Where the Money Goes

Investors want a clear, specific plan for how you will deploy their capital. Vague statements about growing the team are not sufficient. Break down the use of funds by category with specific hires, timelines, and expected outcomes.

A typical Series A use of funds for a SaaS company allocates 50 to 60 percent to sales and marketing for hiring sales reps, SDRs, and increasing marketing spend to drive customer acquisition. Approximately 25 to 30 percent goes to R&D for engineering hires to build product roadmap features and improve the platform. The remaining 10 to 20 percent covers G&A including finance, operations, and infrastructure to support scale.

Tie each investment area to a measurable outcome. For example: hiring three additional sales reps, each targeting £15K new MRR per month, ramping over three months, to add £540K in new ARR over twelve months. This level of specificity demonstrates that you have thought through the plan and can be held accountable.

Common Series A Mistakes

The mistakes that most commonly derail Series A fundraises include starting too late when runway is already short, which creates desperation and weakens negotiating position. Presenting inconsistent metrics where the financial model says one thing and the management accounts say another. Having no clear answer to why now and why you specifically. Overvaluing the business based on 2021 comparables rather than current market valuation benchmarks. And underestimating the time commitment where fundraising typically takes three to six months and consumes significant founder bandwidth.

The single biggest tactical mistake is not having your financial house in order before you start. Investors who find inconsistencies during diligence do not just ask for clarification — they lose confidence in the team. Get your numbers right before your first meeting.

Timeline: When to Start Preparing

Start preparing for your Series A six to nine months before you plan to raise. Use the first three months to get your metrics, financial model, management accounts, and data room into shape. Use the next three months for building investor relationships through warm introductions, attending relevant events, and publishing thought leadership that demonstrates domain expertise. Then launch the active fundraise with everything ready.

The founders who raise fastest and on the best terms are the ones who treated preparation as a project, not an afterthought.

How a Fractional CFO Prepares You for Series A

A fractional CFO builds the entire financial infrastructure for your Series A — the model, the metrics, the management accounts, the data room, and the financial narrative. They ensure consistency across all documents, prepare you for investor questions, and manage the financial workstream of the raise so you can focus on building relationships and closing.

At Scale With CFO, we have prepared SaaS companies for successful Series A rounds by building the financial credibility that investors demand. Book a free discovery call to start your Series A preparation.