Index › Tax and compliance › Corporate tax provision › Bloomberg Tax Provision vs Thomson Reuters ONESOURCE
Corporate tax provision · September 2026 Edition
Bloomberg Tax Provision vs Thomson Reuters ONESOURCE
Three of twelve models named Bloomberg Tax Provision first on the direct prompt; zero named Thomson Reuters ONESOURCE. Bloomberg Tax Provision was named by eleven of the twelve models and Thomson Reuters ONESOURCE by nine and Bloomberg Tax Provision carries 43 labels and Thomson Reuters ONESOURCE 19, so the shares are not directly comparable.
Named in one category this edition.
Named in three categories this edition.
First-choice share10%10%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate14%16%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#2#3A position in a field of 9; printed, not drawn.
Labels4319A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Bloomberg Tax Provision reading right to left. Rank and label count are printed, not drawn.Thomson Reuters ONESOURCE Tax Provision was named alongside these two in ten of the twelve direct answers. Thomson Reuters ONESOURCE Tax Provision vs Bloomberg Tax Provision · Thomson Reuters ONESOURCE Tax Provision vs Thomson Reuters ONESOURCE
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all twelve models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the corporate tax provision page.
By framing
How many of the twelve models made each the first choice, per way of asking, and how many argued against it.
Bloomberg Tax ProvisionFirst choices, of twelve modelsThomson Reuters ONESOURCE
Direct30
Paraphrase041 against Bloomberg Tax Provision
Comparative10
Budget-constrained005 against Bloomberg Tax Provision · 3 against Thomson Reuters ONESOURCE
Scale-constrained10
Negative10
Bars are first choices, 0 to 12 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to twelve.
The direct prompt
The plain question, one answer per model, grouped by where Bloomberg Tax Provision and Thomson Reuters ONESOURCE stood in it.
Bloomberg Tax Provision first, Thomson Reuters ONESOURCE not the choice
3 of 12 modelsThomson Reuters ONESOURCE was named in the answer but not as the choice, or not at all.Gemini 3.5 FlashBloomberg Tax Provision alternatives: Exactera Tax Provision, Longview Tax, Thomson Reuters ONESOURCE Tax Provision, Vena Solutions
DeepSeek V4 FlashBloomberg Tax Provision, Thomson Reuters ONESOURCE Tax Provision alternatives: Sovos Tax Provision, Vertex Tax Accounting
MiniMax M2.5Bloomberg Tax Provision, Thomson Reuters ONESOURCE Tax Provision alternatives: CCH Tagetik Tax Provision & Reporting, Taxfyle, Vertex Tax Accounting
Neither was the first choice, one was named
3 of 12 modelsThe answer put something else first and named one of the two as an alternative.Claude Haiku 4.5no first choice alternatives: Bloomberg Tax Provision, CSC Corptax, Longview Tax, Thomson Reuters ONESOURCE
Qwen 3.7 FlashLongview Tax alternatives: Bloomberg Tax Provision, CSC Corptax, Thomson Reuters ONESOURCE
GLM 4.7 FlashXThomson Reuters ONESOURCE Tax Provision alternatives: Bloomberg Tax Provision, Longview Tax, Sovos Tax Provision
Neither was named
6 of 12 modelsThe answer made no first choice from these two in this category.GPT-5.4 miniThomson Reuters ONESOURCE Tax Provision alternatives: CCH Axcess/ProSystem fx tax provision offerings, Longview Tax, ONESOURCE Income Tax / Direct Tax Essential
Perplexity SonarThomson Reuters ONESOURCE Tax Provision alternatives: CSC Corptax, Wolters Kluwer CCH Tagetik Tax Provision & Reporting
Grok 4.1 FastThomson Reuters ONESOURCE Tax Provision alternatives: TaxPoint, Taxfyle, Vertex Tax Accounting
Mistral SmallThomson Reuters ONESOURCE Tax Provision alternatives: Sovos Tax Provision, Vertex Tax Accounting
Llama 4 MaverickThomson Reuters ONESOURCE Tax Provision alternatives: Avalara, CCH Axcess Tax, Taxfyle
Kimi K2Thomson Reuters ONESOURCE Tax Provision alternatives: CCH Tagetik, FloQast Tax Provision, Longview Tax, Lucasys Tax Provision, Sovos Tax Provision
Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
Bloomberg Tax Provision leads by twelve points.
Bloomberg Tax Provision14%#1 of 9Thomson Reuters ONESOURCE2%#8 of 9Mid-marketThe figures above
Level: the same share of first choices.
Bloomberg Tax Provision10%#2 of 9Thomson Reuters ONESOURCE10%#3 of 9Enterprise
The order flips: Thomson Reuters ONESOURCE leads at enterprise.
Thomson Reuters ONESOURCE20%#2 of 9Bloomberg Tax Provision2%#5 of 9What the models said about Bloomberg Tax Provision
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Bloomberg Tax Provision: An enterprise-grade platform with high implementation overhead.” Qwen 3.7 Flash · budget prompt · hard negative
“significantly cheaper than enterprise solutions like Bloomberg (often $50k-$100k+)” DeepSeek V4 Flash · budget prompt · soft negative
“Deep analytics, but lighter on full compliance | Costly for pure filing needs” Grok 4.1 Fast · paraphrase prompt · soft negative
“Frequently the "go-to" for mid-market companies. It is highly regarded for its transparent calculations (no black box), rapid implementation, and excellent customer support.” Gemini 3.5 Flash · scale prompt · first choice
“If you want the absolute best mix of rapid setup (<2 months), robust calculation, and intuitive interface, choose Bloomberg Tax Provision.” Gemini 3.5 Flash · direct prompt · first choice
“Choose Corptax or Bloomberg if you need comprehensive enterprise-grade automation with the highest audit standards” Kimi K2 · comparative prompt · first choice
What the models said about Thomson Reuters ONESOURCE
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of seven in this category shown.
“Enterprise Options to AVOID on a Limited Budget | Thomson Reuters ONESOURCE | $200K–$2M+/year” Kimi K2 · budget prompt · hard negative
“Avoid: Longview, ONESOURCE, Workiva, Oracle Tax Reporting, and Corptax.” DeepSeek V4 Flash · budget prompt · hard negative
“cannot justify the six-figure price tag of enterprise suites like Bloomberg or Thomson Reuters ONESOURCE” Qwen 3.7 Flash · budget prompt · soft negative
“Choose Thomson Reuters ONESOURCE if you are a larger, audited mid-market C-Corp with multiple subsidiaries” Gemini 3.5 Flash · paraphrase prompt · first choice
“I'd recommend Thomson Reuters ONESOURCE as the top choice for income tax compliance software” Grok 4.1 Fast · paraphrase prompt · first choice
“Corporate income tax (direct tax) | Thomson Reuters ONESOURCE or Vertex” GLM 4.7 FlashX · paraphrase prompt · first choice
Also compared
Comparisons are drawn for the top three products in each category. The output is the models' output; nothing here is a recommendation by the index.